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Airfield pavement concrete for slip form construction

A technology for concrete and airports, applied in the field of concrete, can solve the problems of high cost, low slip form construction efficiency, unsatisfactory quality, etc., and achieve the effects of improving production efficiency, improving construction quality and production efficiency, and maintaining good vertical formwork performance.

Inactive Publication Date: 2021-03-16
SICHUAN CHANGAN YUCAI BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of airport pavement concrete used for slipform construction, to solve the problems of low efficiency, unsatisfactory quality and high cost of slipform construction in the prior art

Method used

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  • Airfield pavement concrete for slip form construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The airport pavement concrete used for slip-form construction according to the present invention is made of the following components and raw materials by weight: 380 parts of cement, 144 parts of water, and 661 parts of fine aggregate, machine-made sand. The fineness modulus range of machine-made sand is 2.6-3.0, the coarse aggregate (coarse aggregate) is 1241 parts of stones, 869 parts of stones with a particle size of 5-16mm, and 372 parts of stones with a particle size of 16-31.5mm , the stone weight ratio of these two specifications is 2.336:1, the water reducing agent is 2.28 parts of polycarboxylic acid water reducing agent, the air-entraining agent is 0.15 part of rosin air-entraining agent (DH-4013), and the thixotropic agent is 6 parts. share.

[0020]The thixotropic agent is prepared from the following raw materials in parts by mass: 11 parts of acrylamide, 1 part of methacrylic acid, 0.1 part of hydrophobic monomer i.e. isobutyl methacrylate, 0.6 p...

Embodiment 2

[0022] Example 2: The airport pavement concrete for slip-form construction according to the present invention is made of the following components and raw materials by weight: 380 parts of cement, 144 parts of water, and 661 parts of fine aggregate, namely natural sand The fineness modulus range of natural sand is 2.6-3.0, the coarse aggregate (coarse aggregate) is 1241 parts of stones, 869 parts of stones with a particle size of 5-16mm, and 372 parts of stones with a particle size of 16-31.5mm , the ratio of the stone weight of these two specifications is 2.336:1, the water reducing agent is 2.28 parts of polycarboxylic acid water reducing agent, the air-entraining agent is 0.15 parts of rosin thermopolymer air-entraining agent, and 9 parts of thixotropic agent.

[0023] The thixotropic agent is made from the following raw materials in parts by mass: 14 parts of acrylamide, 1.5 parts of methacrylic acid, 0.15 parts of hydrophobic monomer, namely dimethylaminoethyl methacrylate,...

Embodiment 3

[0025] Example 3: The airport pavement concrete for slip-form construction according to the present invention is made of the following components and raw materials by weight: 290 parts of cement, 144 parts of water, and 661 parts of fine aggregate, machine-made sand. The fineness modulus range of machine-made sand is 2.6-3.0, the coarse aggregate (coarse aggregate) is 1241 parts of stones, 869 parts of stones with a particle size of 5-16mm, and 372 parts of stones with a particle size of 16-31.5mm , the ratio of stone weight of these two specifications is 2.336:1, the water reducing agent is 2.28 parts of polycarboxylate water reducing agent, the air-entraining agent is 0.15 parts of triterpenoid saponin air-entraining agent, and 9 parts of thixotropic agent. 90 parts of materials; the admixture is mixed from 70 parts of fly ash and 20 parts of silicon powder.

[0026] The thixotropic agent is prepared from the following raw materials in parts by mass: 9 parts of acrylamide, 0...

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Abstract

The invention discloses an airfield pavement concrete for slip form construction. The airfield pavement concrete is characterized by being prepared from the following raw materials in parts by weight:280-430 parts of cement, 115-160 parts of water, 610-790 parts of fine aggregate, 1100-1250 parts of coarse aggregate, namely stones, 1-4 parts of a water reducing agent, 0.1-2 part of an air entraining agent and 6-9 parts of a thixotropic agent, wherein the thixotropic agent is a polyacrylamide hydrophobic association compound. The concrete provided by the invention is good in compactness and filling property, meanwhile, the thixotropic property of the concrete is high, when the concrete is subjected to dynamic treatment (such as high-frequency vibration), slurry is sheared and thinned, andthe concrete has good rheological property and is easy to liquefy and compact; when the concrete is placed in a static state (such as plastering), slurry loses plasticity and becomes viscous rapidly,the concrete has good shape stability, the construction cost can be reduced when the concrete is applied to slip form construction, and meanwhile the construction quality and the production efficiencyof slip form construction are improved.

Description

technical field [0001] The invention relates to an airport pavement concrete, in particular to an airport pavement concrete used for slip form construction, and belongs to the technical field of concrete. Background technique [0002] Slipform paving is fast and efficient. Generally, it is fully computer-controlled, and its process operations are continuous and orderly, and the operation is simple, which can improve construction conditions and reduce labor intensity. However, due to the improper adjustment of the workability of freshly mixed cement concrete, there are common diseases such as insufficient flatness, cracking, slump, and pockmarked surface in slip form construction, resulting in the quality and construction speed advantages of mechanical construction cannot be fully and thoroughly played. . [0003] Through the analysis of the actual construction of slipform paving, the workability requirements of slipform paving technology for concrete are divided into two t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B2201/50C04B2111/0075C04B14/06C04B14/02C04B24/34C04B24/124C04B24/04C04B24/045C04B22/14C04B22/062C04B2103/302
Inventor 王龙刘欢黄玉美刘昭洋刘磊李玉凤王玉乾吕东伟石雄松刘松光
Owner SICHUAN CHANGAN YUCAI BUILDING MATERIALS CO LTD
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