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High-performance layering-resistant pavement rubber concrete

A rubberized concrete, anti-delamination technology, applied in the field of high-performance anti-delamination rubber concrete, highway pavement engineering, can solve problems such as broken plates, insufficient environmental protection, frequency of surface damage, etc.

Active Publication Date: 2021-05-11
沃克豪斯(黄冈)绿色建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This material has three disadvantages: ①Under the action of heavy-duty traffic, the road slab made of this material is prone to fracture, that is, the phenomenon of broken slabs, which affects road driving safety
②Affected by the properties of concrete itself, the material is affected by the freeze-thaw environment, rainwater immersion erosion, etc., and its durability is greatly reduced
③Affected by the rolling and wear of vehicles, the road surface is prone to multiple surface damages and the frequency of occurrence is high, which increases maintenance costs
However, the rubber concrete in the prior art still has defects such as low pressure bearing capacity, poor deformation resistance, high cost, complicated process, poor durability, insufficient environmental protection, and rubber is easy to float.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] High-performance anti-stratification pavement rubber concrete is composed of the following raw materials: 420 parts of cement, 34 parts of fly ash, 660 parts of river sand, 65 parts of rubber aggregate, 65 parts of modified rubber powder, 1200 parts of steel slag 12 parts of water agent, 2 parts of calcium fluorosilicate, 1 part of triisopropanolamine, 1 part of sodium tripolyphosphate, 0.7 part of polyaluminum sulfate, 0.3 part of sodium methylene dinaphthalene sulfonate, and the water-to-binder ratio is 0.30.

[0026] After testing, the initial fluidity of rubber concrete is 680mm, the concrete forming effect is good, the mixing is soft, the rubber aggregate does not float, the mass loss rate of 300 freeze-thaw cycles is -1.1%, and the relative dynamic elastic modulus of 300 freeze-thaw cycles is 77%. The 28d compressive strength is 62MPa, the 28d flexural strength is 7.0MPa, the wear resistance is 2.5, and the total electric flux is 950C.

Embodiment 2

[0028] High-performance anti-stratification pavement rubber concrete is composed of the following raw materials: 500 parts of cement, 38 parts of fly ash, 640 parts of river sand, 70 parts of rubber aggregate, 75 parts of modified rubber powder, 1180 parts of steel slag 15 parts of water agent, 4 parts of calcium fluorosilicate, 2 parts of triethanolamine, 1 part of sodium tripolyphosphate, 0.7 part of polyaluminum sulfate, 0.3 part of sodium methylene dinaphthalene sulfonate, and the water-to-binder ratio is 0.29.

[0029] After testing, the initial fluidity of rubber concrete is 710mm, the concrete forming effect is good, the mixing is soft, the rubber aggregate does not float, the mass loss rate of 300 freeze-thaw cycles is -0.9%, and the relative dynamic elastic modulus of 300 freeze-thaw cycles is 83%. The 28d compressive strength is 71MPa, the 28d flexural strength is 8.3MPa, the wear resistance is 2.6, and the total electric flux is 890C.

Embodiment 3

[0031] High-performance anti-stratification pavement rubber concrete is composed of the following raw materials: 450 parts of cement, 40 parts of fly ash, 700 parts of river sand, 68 parts of rubber aggregates, 60 parts of modified rubber powder, 1170 parts of steel slag 13 parts of water agent, 2 parts of magnesium fluorosilicate, 1 part of triethanolamine, 1 part of sodium tripolyphosphate, 0.7 part of polyaluminum sulfate, 0.3 part of sodium methylene dinaphthalene sulfonate, and the water-to-binder ratio is 0.30.

[0032] After testing, the initial fluidity of rubber concrete is 690mm, the concrete forming effect is good, the mixing is soft, the rubber aggregate does not float, the mass loss rate of 300 freeze-thaw cycles is -0.9%, and the relative dynamic elastic modulus of 300 freeze-thaw cycles is 81%. The 28d compressive strength is 66MPa, the 28d flexural strength is 7.8MPa, the wear resistance is 2.3, and the total electric flux is 960C.

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Abstract

The invention provides high-performance layering-resistant pavement rubber concrete which is prepared from the following raw materials: cement, fly ash, river sand, rubber aggregate, modified rubber powder, steel slag coarse aggregate, a water reducing agent, a reinforcing auxiliary agent and water, has the characteristics of high loading capacity, high deformation resistance, high toughness and high durability, and can be used for highway pavement engineering under heavy traffic.

Description

technical field [0001] The invention belongs to the technical field of cement-based building materials, and in particular relates to a high-performance anti-layered pavement rubber concrete, which can be used for highway pavement engineering under heavy-load traffic. Background technique [0002] With the continuous increase of national infrastructure investment and construction and the continuous expansion of national demand for efficient commuting, the rapid construction of municipal roads and highways, cement concrete has been used as the most important structure of roads and bridges in my country due to its high strength, cheap raw materials and high rigidity. [0003] The main raw materials of cement concrete are cement, cementitious materials composed of admixtures, coarse and fine aggregates composed of sand and gravel, and functional additives such as water reducers and expansion agents. The main active mineral components of cement are tricalcium silicate, dicalcium s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20
CPCC04B28/04C04B2111/0075C04B2111/20C04B18/08C04B14/06C04B18/22C04B18/142C04B2103/302C04B22/124C04B24/122C04B22/16C04B22/147C04B24/20
Inventor 赵兴美吕嘉
Owner 沃克豪斯(黄冈)绿色建材有限公司
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