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Preparation method and application for fly ash based polymer cementing material and porous concrete material

A technology of polymer glue and fly ash, which is applied in the field of building materials, can solve the problems of difficult balance between road bearing capacity and functionality, shortening the service life of road slabs, and difficulty in achieving flexural strength, etc., achieving remarkable effects of water permeability and noise reduction , Realize the comprehensive utilization of resources, meet the effect of industrial production and construction requirements

Inactive Publication Date: 2016-05-04
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of its use in pavement structures are: 1. Low strength, and it is difficult to achieve a flexural strength above 4.5MPa; the greater the porosity, the lower the strength, and it is difficult to balance the bearing capacity and functionality of the pavement; 2. Poor volume stability , easy to produce shrinkage cracks; 3, poor corrosion resistance, shortening the service life of the pavement
[0008] To sum up, there are very few systematic studies on pavement porous concrete in my country, and there are various problems, and using Geoash as a cementing material to prepare porous concrete for road surface, there is no relevant patent report

Method used

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  • Preparation method and application for fly ash based polymer cementing material and porous concrete material

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Experimental program
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Effect test

Embodiment 1

[0040] A certain basalt gravel composed of 4.75~9.5mm:9.5~16.0mm (standard square hole sieve)=7:3 particle size is used, and its tapped density is 1722kg / m 3 , choose unit aggregate volume ratio 0.96, then 1m 3 The dosage of porous concrete basalt gravel is 1722×0.96=1653kg; water-binder ratio is 0.36; Amount 15%), nanometer zeolite powder is 12kg (doping amount 5%); The compound alkali excitation component of potassium sodium water glass and caustic alkali is 36kg (15% of cementing material consumption), modulus M=z / (x+ y) = 1.4.

[0041] The 28-day-old fly ash-based polymer porous concrete formed by vibratory compaction is averagely cut along the depth direction, and the pore state in the middle of the specimen can be found in figure 1 . The internal pores of porous concrete are evenly distributed, the measured connected porosity is 20.3%, the depth of the surface anti-skid structure is 1.3mm, the measured water permeability coefficient of the constant water head method i...

Embodiment 2

[0043] Use a certain granite gravel composed of 4.75~9.5mm: 9.5~16.0mm (standard square hole sieve) = 7:3 particle size, and its tapped density is 1674kg / m 3 , choose unit aggregate volume ratio 0.92, then 1m 3 The amount of porous concrete granite crushed stone is 1674×0.92=1540kg; the water-binder ratio is 0.32; the amount of fly ash base polymer cementitious material is 310kg, of which the amount of class I and F fly ash is 233kg (75%), S95 granulation Blast furnace slag is 31kg (amount 10%), nanometer zeolite powder is 31kg (amount 10%), and desulfurized gypsum powder is 15.5kg (amount 5%); 62kg (20% of the amount of cement used), modulus M = 1.6.

[0044] The measured connected porosity of porous concrete is 18.4%, the surface anti-skid structure depth is 1.2mm, the water permeability coefficient measured by the constant water head method is 4.9mm / s, the water permeability coefficient tested by the road permeable meter is 1108mL / 15s, and the average vertical sound absorp...

Embodiment 3

[0052] Select 30 groups of porous concrete successfully prepared for highway combined double-layer concrete surface, and make statistics on the amount of each component material. The market price of non-pumped C35 ordinary cement concrete is about 250 yuan / m 3 Second, the market price of its cementitious material cement is 440-500 yuan / ton; the market price of fly ash is about 180 yuan / ton, the granulated blast furnace slag powder is about 180 yuan / ton, and the gypsum powder is about 200 yuan / ton. Zeolite powder is 800 yuan / ton, basalt crushed stone is about 200 yuan / ton, and the compound alkali activator made of sodium silicate and caustic alkali is about 100 yuan / m 3 In terms of yuan, the cost of the composite material of fly ash base polymer porous concrete with the same strength level is about 440 yuan / m 3 . The price gap between fly ash base polymer porous concrete and ordinary cement concrete is mainly caused by the different types of coarse aggregate. As far as the ce...

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Abstract

The invention discloses a preparation method and application for a fly ash based polymer cementing material and a porous concrete material. The fly ash based polymer cementing material is composed of fly ash, granulated blast-furnace slag, nanometer zeolite powder, gypsum powder, and a compound alkali activator prepared from potassium-sodium water glass and caustic alkali; porous concrete is prepared from the fly ash based polymer cementing material and special-grade coarse aggregates like basalt or granite, is applied in construction of road pavement and has the characteristics of high porosity, good water permeability, skid resistance and sound-absorptive and noise-reducing properties, high strength, stable volume, excellent durability, etc.; meanwhile, the fly ash based polymer porous concrete has simple preparation method and low production cost, and meets industrial production and construction requirements.

Description

technical field [0001] The invention relates to a fly ash-based polymer cementing material, a porous concrete material obtained based on the fly ash-based polymer cementing material, and the application of the porous concrete material in pavement engineering, belonging to the technical field of building materials. Background technique [0002] Cement concrete pavement has high strength, strong plate integrity, flame retardancy, and good durability. It is one of the main forms of pavement structure, especially for special road sections such as long tunnels, long steep slopes, and heavy-duty traffic. Several problems of traditional concrete pavement are becoming more and more prominent: first, the anti-skid structure of the horizontal groove is easy to wear flat, the anti-skid performance of the road surface decays quickly, and traffic accidents occur frequently; second, the road noise is about 5dB higher than that of ordinary asphalt pavement. The development of the region is...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B38/00C04B7/26
CPCC04B7/243C04B12/005C04B28/006C04B14/04C04B38/00Y02P40/10
Inventor 陈瑜李蒙强何静涛刘洋钱益想
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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