Prefabrication cast-in-place concrete floor

A technology for concrete and floor slabs, used in floors, building components, buildings, etc., can solve the problems of high concrete shrinkage, high cementitious material and sand content, and achieve short curing time, reliable quality, and reduce the incidence of micro-cracks. Effect

Inactive Publication Date: 2009-06-17
刘期亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the binder and sand content of precast concrete are relatively large, resulting in high shrinkage of concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A prefabricated cast-in-place concrete floor slab, wherein the components and weight / number ratios of the prefabricated cast-in-place concrete floor slab are:

[0020] Silicon cement: 290 parts;

[0021] 72 parts of fly ash;

[0022] 8 parts of HX compound pumping agent;

[0023] Sand 740 parts;

[0024] Stone 900 copies;

[0025] 170 parts of water.

[0026] The strength of Portland cement is 32.5.

Embodiment 2

[0028] Silicon cement: 360 parts;

[0029] 90 parts of fly ash;

[0030] 10 parts of HX compound pumping agent;

[0031] Sand 820 parts;

[0032] Stone 1100 parts;

[0033] 230 parts of water.

[0034] The strength of ordinary silicon cement is 32.5.

Embodiment 3

[0036] Silicon cement: 300 parts;

[0037] 80 parts of fly ash;

[0038] 9 parts of HX compound pumping agent;

[0039] Sand 800 parts;

[0040] Stone 960 parts;

[0041] 210 parts of water.

[0042] The strength of ordinary silicon cement is 32.5.

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Abstract

The invention belongs to a prefabrication cast-in-situ concrete slab, which comprises the following compositions by weight portion: 290 to 360 portions of ordinary portland cement, 72 to 90 portions of fly ash, 8 to 10 portions of additive, 740 to 820 portions of sand, 900 to 1,100 portions of stones and 170 to 230 portions of water. The invention provides a prefabrication cast-in-situ concrete slab having the advantages of small shrinkage strain, strong cracking resistance and short curing time.

Description

technical field [0001] The invention belongs to the technical field of concrete, in particular to a prefabricated cast-in-place concrete floor slab. Background technique [0002] Precast concrete has advanced production technology, reliable quality, and less environmental pollution. It has gradually replaced on-site mixing concrete. Due to the needs of transportation and pumping, precast concrete uses admixtures to increase the fluidity of the concrete and delay the initial setting time of the concrete. However, the binder and sand content of precast concrete are relatively large, resulting in high shrinkage of concrete. With the use of high-strength concrete, the use of high-strength cement is becoming more and more common, and the amount of cement is also increasing, which exacerbates the greatly increased shrinkage of precast concrete. Through sampling tests on the shrinkage value of precast concrete used in prefabricated cast-in-place concrete slabs in our city, we fou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E04B5/16C04B18/08C04B14/06C04B14/02
Inventor 刘期亮
Owner 刘期亮
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