{"id":3187,"date":"2026-06-27T13:39:18","date_gmt":"2026-06-27T05:39:18","guid":{"rendered":"https:\/\/www.cnkelaiii.com\/?p=3187"},"modified":"2026-06-27T13:54:03","modified_gmt":"2026-06-27T05:54:03","slug":"hollow-core-slab-production-line","status":"publish","type":"post","link":"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/","title":{"rendered":"\u041b\u0438\u043d\u0438\u044f \u043f\u043e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u0443 \u043f\u0443\u0441\u0442\u043e\u0442\u0435\u043b\u044b\u0445 \u043f\u043b\u0438\u0442 \u0442\u043e\u043b\u0449\u0438\u043d\u043e\u0439 120\u2013320 \u043c\u043c | \u0421\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u044d\u043a\u0441\u0442\u0440\u0443\u0434\u0435\u0440\u044b \u2013| Kelai Machinery"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u041e\u0433\u043b\u0430\u0432\u043b\u0435\u043d\u0438\u0435<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#Hollow_Core_Slab_Production_Line_The_Complete_Guide_for_Precast_Plant_Owners\" >Hollow Core Slab Production Line: The Complete Guide for Precast Plant Owners<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#1_Machine_Types_Dedicated_Extruder_vs_Multi-Tooling_Slipformer\" >1. Machine Types: Dedicated Extruder vs. Multi-Tooling Slipformer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#2_Thickness_Range_and_Machine_Options\" >2. Thickness Range and Machine Options<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#3_Prestressing_Strand_Selection_Per_Thickness\" >3. Prestressing: Strand Selection Per Thickness<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#4_Bed_Length_and_Plant_Layout_of_Hollow_Core_Slab_Production_Line\" >4. Bed Length and Plant Layout of Hollow Core Slab Production Line<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#5_Line_Scope_What_Is_Included_Excluding_Batching_Plant\" >5. Line Scope: What Is Included (Excluding Batching Plant)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#6_Why_Henan_Kelai_Industrial_vs_European_Alternatives\" >6. Why Henan Kelai Industrial vs. European Alternatives<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#7_Commercial_Terms_and_How_to_Request_a_Quotation\" >7. Commercial Terms and How to Request a Quotation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.cnkelaiii.com\/ru\/blog\/hollow-core-slab-production-line\/#8_Frequently_Asked_Questions_of_Hollow_Core_Slab_Production_Line\" >8. Frequently Asked Questions of Hollow Core Slab Production Line<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"Hollow_Core_Slab_Production_Line_The_Complete_Guide_for_Precast_Plant_Owners\"><\/span><strong>Hollow Core Slab Production Line: The Complete Guide for Precast Plant Owners<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<hr \/>\n<p>Whether you are setting up a greenfield <a href=\"https:\/\/www.cnkelaiii.com\/ru\/concrete-hollow-core-slab-machine\/\">Hollow Core Slab Production Line<\/a> in India, expanding an existing facility in Southeast Asia, or replacing ageing slipform equipment, the purchasing decision for a hollow core slab production line is one of the most consequential capital investments you will make. This guide answers every question that serious buyers raise \u2014 including the specific technical and commercial points regularly received from customers considering options from Finland, Italy,\u00a0 (Belgium) and TDM extruders alongside Henan Kelai&#8217;s machines.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"1_Machine_Types_Dedicated_Extruder_vs_Multi-Tooling_Slipformer\"><\/span>1. Machine Types: Dedicated Extruder vs. Multi-Tooling Slipformer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Two fundamentally different forming technologies produce prestressed hollow core slabs, and the choice between them affects compaction quality, surface finish, cycle time, and capital cost.<\/p>\n<p><strong>Extruder (pushing-type)<\/strong><\/p>\n<p>An extruder uses one or more rotating augers to push stiff, zero-slump concrete forward and around mandrels, forming the voids as the machine self-propels along the casting bed. Kelai&#8217;s machines are dedicated pushing-type extruders. Each machine is purpose-built and precision-engineered for a single slab thickness, which is the key distinction from some European slipformer configurations.<\/p>\n<p><strong>Kelai&#8217;s product range covers 120\u2013320 mm slab thickness.<\/strong> However, Kelai does not offer a single-machine, tooling-change configuration. Instead, each thickness \u2014 120, 150, 200, 250 and 320 mm \u2014 is produced on its own dedicated extruder, custom-built for that specific cross-section. This dedicated-machine approach delivers consistent, high-efficiency output for each thickness with no downtime associated with changeover, and represents exceptional value for money compared to multi-tooling alternatives.<\/p>\n<p><strong>Slipformer<\/strong><\/p>\n<p>A slipformer compacts concrete using vibration while the machine moves forward, pulling a trailing form that slips away to leave the slab behind. Slipformers are used by some European brands and may accommodate multiple thicknesses through forming insert changes. Kelai does not manufacture slipformers; Kelai&#8217;s pushing-type extruder technology delivers superior concrete compaction through the dry-cast auger process.<\/p>\n<p><strong>Why dedicated extruders make operational sense<\/strong><\/p>\n<p>Some buyers initially inquire about a single machine covering all thicknesses. In practice, most high-volume precast plants operate dedicated machines per thickness for the following reasons:<\/p>\n<ul>\n<li>No changeover downtime \u2014 each machine runs continuously on its product<\/li>\n<li>Consistent calibration and compaction settings optimised for one cross-section<\/li>\n<li>Operators develop deep expertise on a single machine type<\/li>\n<li>Multiple beds can run simultaneously, maximising daily output<\/li>\n<li>Lower risk of quality inconsistency caused by tooling changes<\/li>\n<\/ul>\n<p>Kelai&#8217;s dedicated extruders are purpose-built for efficiency and durability, and are priced significantly below comparable European equipment \u2014 making the five-machine configuration highly competitive on total cost of ownership.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"2_Thickness_Range_and_Machine_Options\"><\/span>2. Thickness Range and Machine Options<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kelai&#8217;s hollow core slab production line covers the five most commonly specified structural thicknesses:<\/p>\n<ul>\n<li><strong>120 mm<\/strong> \u2014 Light residential floors and short-span applications<\/li>\n<li><strong>150 mm<\/strong> \u2014 Residential and light commercial floors<\/li>\n<li><strong>200 mm<\/strong> \u2014 Commercial floors and medium spans<\/li>\n<li><strong>250 mm<\/strong> \u2014 Long-span commercial and industrial floors<\/li>\n<li><strong>320 mm<\/strong> \u2014 Heavy industrial loads and long spans<\/li>\n<\/ul>\n<p>Each thickness is produced on a dedicated pushing-type extruder, custom-manufactured to the precise cross-section geometry, void configuration, and production capacity required. Machines for different thicknesses share the same operating principles and control logic, making multi-machine plants straightforward for operators to manage.<\/p>\n<p><strong>Phased ordering<\/strong><\/p>\n<p>For customers wishing to start with 150, 200 and 250 mm (Phase 1) and add 120 and 320 mm machines later (Phase 2), Kelai offers a phased supply arrangement. Pricing for Phase 2 machines is confirmed at the time of the Phase 1 order to protect against raw material cost escalation. Customers ordering all five machines together benefit from a bulk-order discount.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"3_Prestressing_Strand_Selection_Per_Thickness\"><\/span>3. Prestressing: Strand Selection Per Thickness<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hollow core slabs are prestressed using low-relaxation 7-wire strand per ASTM A416 Grade 270 or EN 10138. Kelai&#8217;s production lines are compatible with both 12.7 mm (\u00bd inch) and 15.2 mm (0.6 inch) diameter strand. The correct strand diameter and number of strands per slab width depends on the design span, imposed load, and slab thickness.<\/p>\n<p><strong>Recommended strand configuration per thickness<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>Slab Thickness<\/th>\n<th>Recommended Strand \u00d8<\/th>\n<th>Typical No. of Strands (per 1.2 m width)<\/th>\n<th>Initial Prestress Force<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>120 mm<\/td>\n<td>12.7 mm<\/td>\n<td>4\u20135<\/td>\n<td>~70\u201375% of UTS<\/td>\n<\/tr>\n<tr>\n<td>150 mm<\/td>\n<td>12.7 mm<\/td>\n<td>4\u20136<\/td>\n<td>~70\u201375% of UTS<\/td>\n<\/tr>\n<tr>\n<td>200 mm<\/td>\n<td>12.7 mm or 15.2 mm<\/td>\n<td>4\u20136<\/td>\n<td>~70\u201375% of UTS<\/td>\n<\/tr>\n<tr>\n<td>250 mm<\/td>\n<td>15.2 mm<\/td>\n<td>4\u20136<\/td>\n<td>~70\u201375% of UTS<\/td>\n<\/tr>\n<tr>\n<td>320 mm<\/td>\n<td>15.2 mm<\/td>\n<td>5\u20137<\/td>\n<td>~70\u201375% of UTS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Kelai&#8217;s hydraulic stressing jacks are designed for both strand diameters. The tensioning system includes a calibrated load cell for accurate prestress verification and is compatible with both single-strand and multi-strand stressing operations.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"4_Bed_Length_and_Plant_Layout_of_Hollow_Core_Slab_Production_Line\"><\/span>4. Bed Length and Plant Layout of Hollow Core Slab Production Line<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A common concern among buyers with large shop floors is whether machines are limited to 60\u201380 m casting beds. With Kelai, the answer is clear: <strong>Kelai extruders can operate on casting beds of any length \u2014 including 150 m, 180 m, or longer.<\/strong> The machine itself has no physical limitation related to bed length. The practical constraints are:<\/p>\n<ul>\n<li><strong>Strand continuity:<\/strong> Standard prestressing strand coil lengths allow uninterrupted stressing across 150 m beds without splices.<\/li>\n<li><strong>Concrete distribution reach:<\/strong> Kelai&#8217;s concrete shuttle and distribution wagon is configured to the bed length at order time.<\/li>\n<li><strong>Saw cutting position:<\/strong> The travelling diamond-blade saw operates along the full bed length on the same rail system as the extruder.<\/li>\n<\/ul>\n<p><strong>Sample layout for a 20 m \u00d7 200 m building<\/strong><\/p>\n<p>Based on a building of 20 m (width) \u00d7 200 m (length), a practical layout using 150 m casting beds would look as follows:<\/p>\n<table>\n<thead>\n<tr>\n<th>Zone<\/th>\n<th>Length<\/th>\n<th>Purpose<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Stressing abutment (dead end)<\/td>\n<td>~3 m<\/td>\n<td>Fixed anchor block<\/td>\n<\/tr>\n<tr>\n<td>Casting bed<\/td>\n<td>150 m<\/td>\n<td>Production and curing<\/td>\n<\/tr>\n<tr>\n<td>Stressing abutment (live end)<\/td>\n<td>~3 m<\/td>\n<td>Hydraulic jack zone<\/td>\n<\/tr>\n<tr>\n<td>Demoulding \/ stacking \/ dispatch<\/td>\n<td>~44 m<\/td>\n<td>Overhead crane travel, storage<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>With a 20 m clear width, two parallel casting beds \u2014 each approximately 8 m wide including walkways \u2014 can comfortably run side by side, enabling simultaneous production of two slab thicknesses. Kelai&#8217;s engineering team provides a detailed CAD layout drawing tailored to the customer&#8217;s building dimensions as part of the technical proposal.<\/p>\n<p><strong>Why longer beds matter economically<\/strong><\/p>\n<p>A 150 m bed instead of two 75 m beds reduces strand waste at abutments by roughly 50%, cuts the number of daily set-ups in half, and improves crane efficiency by handling longer slab bundles. For a plant producing 500\u20131,000 m\u00b2 per day, this translates to meaningful savings in both labour and materials.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"5_Line_Scope_What_Is_Included_Excluding_Batching_Plant\"><\/span>5. Line Scope: What Is Included (Excluding Batching Plant)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kelai supplies a complete production line\uff08Hollow Core Slab Production Line\uff09. Where the customer already has a concrete batching plant, the following items form the remaining scope and are quoted as separate line items:<\/p>\n<ul>\n<li><strong>Extruder machines<\/strong> \u2014 Dedicated pushing-type extruder(s) for each required thickness<\/li>\n<li><strong>Concrete distribution shuttle<\/strong> \u2014 Self-propelled wagon matched to bed length<\/li>\n<li><strong>Diamond-blade travelling saw<\/strong> \u2014 Rail-mounted, variable-angle cutting (0\u201390\u00b0)<\/li>\n<li><strong>\u041e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u043b\u044f \u043f\u0440\u0435\u0434\u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u044f<\/strong> \u2014 Hydraulic jack, pump unit, load cell, grip sets for 12.7 mm and 15.2 mm strand<\/li>\n<li><strong>Lifting beam and vacuum clamps<\/strong> \u2014 Adjustable beam for standard slab widths; vacuum cup cluster<\/li>\n<li><strong>Concrete Batching Plant system<\/strong> \u2014 We can provide matching equipment such as high-efficiency concrete mixers, screw conveyors, and aggregate bins.<\/li>\n<li><strong>Casting bed rails and abutments<\/strong> \u2014 Precision-levelled rail systems; reinforced concrete abutment design drawings<\/li>\n<li><strong>Engineering support<\/strong> \u2014 installation guidance, commissioning, operator training (on-site)<\/li>\n<\/ul>\n<p>Each item is priced separately so customers can adjust the scope to match their existing equipment inventory.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"6_Why_Henan_Kelai_Industrial_vs_European_Alternatives\"><\/span>6. Why <a href=\"http:\/\/www.kelaiii.com\" target=\"_blank\" rel=\"noopener\">\u0425\u044d\u043d\u0430\u043d\u044c \u041a\u0435\u043b\u0430\u0439<\/a> Industrial vs. European Alternatives<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>European brands such as Elematic, Nordimpianti, and Echo Precast produce well-regarded machines. The relevant question for buyers in India, Southeast Asia, the Middle East, and Africa is whether the European premium is justified for their specific project and market context.<\/p>\n<table>\n<thead>\n<tr>\n<th>Comparison Point<\/th>\n<th>European Brands<\/th>\n<th>Henan Kelai machinery<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Machine FOB price (full 5-thickness line)<\/td>\n<td>High (\u20ac1.5M\u2013\u20ac3M+ typical)<\/td>\n<td>Significantly lower; contact us for exact quote<\/td>\n<\/tr>\n<tr>\n<td>Spare parts cost and lead time<\/td>\n<td>High; typically 4\u201312 weeks from Europe<\/td>\n<td>Low; stocked in China; 1\u20133 weeks<\/td>\n<\/tr>\n<tr>\n<td>Technical support in India \/ Asia<\/td>\n<td>Costly; travel-based<\/td>\n<td>Responsive; regional engineers available<\/td>\n<\/tr>\n<tr>\n<td>CIF Mundra delivery time<\/td>\n<td>16\u201328 weeks typical<\/td>\n<td>12\u201318 weeks typical<\/td>\n<\/tr>\n<tr>\n<td>Bed length flexibility<\/td>\n<td>Up to 200 m+<\/td>\n<td>Up to 200 m+<\/td>\n<\/tr>\n<tr>\n<td>EN 1168 compatible production<\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td>Machine configuration<\/td>\n<td>Single machine or multi-tooling<\/td>\n<td>Dedicated extruder per thickness<\/td>\n<\/tr>\n<tr>\n<td>Reference installations<\/td>\n<td>Europe, Americas, Middle East<\/td>\n<td>China, India, Middle East, Africa, SE Asia<\/td>\n<\/tr>\n<tr>\n<td>Payment terms flexibility<\/td>\n<td>Limited<\/td>\n<td>T\/T 50% advance + 50% before shipment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Kelai&#8217;s dedicated extruder model is highly efficient precisely because each machine is optimised for one thickness only \u2014 there are no compromises in auger geometry, mandrel configuration, or compaction force that inevitably come with universal-tooling designs. The result is consistent slab quality, lower maintenance cost, and a faster return on investment.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"7_Commercial_Terms_and_How_to_Request_a_Quotation\"><\/span>7. Commercial Terms and How to Request a Quotation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kelai provides formal budgetary quotations on both FOB Chinese port and CIF Mundra basis. The quotation package includes:<\/p>\n<ul>\n<li>Line-item pricing for each component of the scope<\/li>\n<li>Individual machine pricing per thickness (dedicated extruder model)<\/li>\n<li>Phased delivery schedule if required (Phase 1 + Phase 2)<\/li>\n<li>Bulk-order discount for all five thickness machines ordered together<\/li>\n<li>Payment terms: 50% T\/T advance + 50% T\/T before shipment<\/li>\n<li>Delivery time: 12\u201318 weeks from deposit to readiness for shipment<\/li>\n<li>Company profile, technical catalogue, machine operation videos, and reference plant list<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"8_Frequently_Asked_Questions_of_Hollow_Core_Slab_Production_Line\"><\/span>8. Frequently Asked Questions of Hollow Core Slab Production Line<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Can Kelai produce all five thicknesses from a single machine by changing tooling?<\/strong><\/p>\n<p>No. Kelai&#8217;s <a href=\"https:\/\/www.cnkelaiii.com\/ru\/concrete-hollow-core-slab-machine\/\">hollow core slab extruders<\/a> are dedicated pushing-type machines, each precision-built for a single slab thickness. Producing five thicknesses requires five separate machines. This dedicated approach delivers higher efficiency, consistent compaction quality, and greater reliability than tooling-change configurations, at a total cost that remains highly competitive against European alternatives.<\/p>\n<p><strong>What concrete mix is required?<\/strong><\/p>\n<p>Kelai extruders use a zero-slump dry-cast concrete mix, typically with a water\/cement ratio of 0.30\u20130.35. Aggregate maximum size is 10\u201314 mm. Cement content is usually 360\u2013400 kg\/m\u00b3 for a C45\u2013C55 target compressive strength. Kelai provides a recommended mix design at commissioning, adjusted to local aggregate conditions.<\/p>\n<p><strong>Is the curing system mandatory, or can natural curing be used?<\/strong><\/p>\n<p>Natural curing is feasible in warm climates (ambient temperature above 20\u00b0C), but it extends the strand release cycle from approximately 16 hours (with steam curing at 60\u201370\u00b0C) to 24\u201348 hours. For plants targeting high daily output, steam curing or thermal cover curing is recommended. Kelai supplies both options.<\/p>\n<p><strong>What after-sales support does Kelai provide for an Indian plant?<\/strong><\/p>\n<p>Kelai&#8217;s service offer for Indian customers includes on-site commissioning and operator training (typically two weeks), a 12-month warranty on structural components, remote technical support via video call, and a spare parts supply commitment with standard parts delivered within 2\u20133 weeks to an Indian port. A service visit programme for the first year of operation is available at additional cost.<\/p>\n<p><strong>Does the production line meet IS standards in addition to EN 1168?<\/strong><\/p>\n<p>Hollow core slabs produced on Kelai lines can be designed and tested to meet IS 1343 (Prestressed Concrete Code of Practice) and IS 6452 (High Strength Low Alloy Steel Wire Strand for Prestressed Concrete). The slab design \u2014 not just the machine \u2014 must conform to the applicable standard. Kelai provides design reference documentation to assist the customer&#8217;s structural engineer.<\/p>\n<p><strong>What is the typical production output per casting bed per day?<\/strong><\/p>\n<p>On a 150 m casting bed producing 200 mm slabs at 1.2 m width, a well-run shift can cast the full bed in approximately 2\u20133 hours. After Natural curing (16 hours), demoulding and saw cutting take a further 2\u20133 hours. A typical output is 150\u2013180 m\u00b2 per bed per day on a single-shift plus overnight curing cycle, with higher output achievable through two-shift operation.<\/p>\n<hr \/>\n<blockquote class=\"wp-embedded-content\" data-secret=\"wlDKvysfFN\"><p><a href=\"https:\/\/www.cnkelaiii.com\/ru\/concrete-hollow-core-slab-machine\/\">\u041c\u0430\u0448\u0438\u043d\u0430 \u0434\u043b\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u0430 \u0441\u0431\u043e\u0440\u043d\u044b\u0445 \u0436\u0435\u043b\u0435\u0437\u043e\u0431\u0435\u0442\u043e\u043d\u043d\u044b\u0445 \u043f\u0443\u0441\u0442\u043e\u0442\u043d\u044b\u0445 \u043f\u043b\u0438\u0442 \u0434\u043b\u044f \u043f\u043e\u043b\u0430 \u0438 \u043a\u0440\u044b\u0448\u0438<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content lazyload\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u300a Precast Concrete Hollow Core Slab Machine for Floor &amp; Roof Panels \u300b\u2014KELAI China \u2013 Henan Kelai Industrial Co., Ltd.\" data-src=\"https:\/\/www.cnkelaiii.com\/concrete-hollow-core-slab-machine\/embed\/#?secret=r2zxyz6eWG#?secret=wlDKvysfFN\" data-secret=\"wlDKvysfFN\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-load-mode=\"1\"><\/iframe><\/p>","protected":false},"excerpt":{"rendered":"<p>Hollow Core Slab Production Line: The Complete Guide for Precast Plant Owners Whether you are setting up a greenfield Hollow Core Slab Production Line in India, expanding an existing facility in Southeast Asia, or replacing ageing slipform equipment, the purchasing decision for a hollow core slab production line is one of the most consequential capital [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3188,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3187","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/posts\/3187","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/comments?post=3187"}],"version-history":[{"count":0,"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/posts\/3187\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/media\/3188"}],"wp:attachment":[{"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/media?parent=3187"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/categories?post=3187"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cnkelaiii.com\/ru\/wp-json\/wp\/v2\/tags?post=3187"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}