Water-permeable concrete formula and preparation method thereof

A concrete and formula technology, applied in the field of permeable concrete formula and its preparation, can solve the problems of cement and lime mixed into fine pores, low mechanical strength, etc., and achieve the effects of reducing corrosion, improving water permeability and mechanical function

Inactive Publication Date: 2019-11-05
山东广发建材制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the pore diameter is too small, it is not conducive to the mixing of cement and lime into the pores, so the mechanical strength of the concrete is small after forming.

Method used

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  • Water-permeable concrete formula and preparation method thereof
  • Water-permeable concrete formula and preparation method thereof
  • Water-permeable concrete formula and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The marble is crushed into gravel with a particle size of 4-8mm and 15-24mm by a double-cavity jaw crusher, and the crushed stone with a particle size of 4-8mm is directly used as fine aggregate, and the particle size is 15-24mm. Spherical or ellipsoid with smooth surface, as fine aggregate; the bulk density of the fine aggregate is 1481kg / m 3 , the porosity is 43%; the bulk density of the coarse aggregate is 1089kg / m 3 , the porosity is 56%;

[0022] Fly ash is waste from power plants, the particle size is 10-20μm, and the bulk density is 190kg / m 3 . The specific surface area is 19.0m 2 / g, silica content ≥ 90%.

[0023] Mix 5kg of coarse aggregate and 4kg of fine aggregate evenly, spray 9L of water, stir at a rate of 20r / min, and stir for 1-3min to ensure that the surface of the coarse aggregate and fine aggregate is covered with water; add 7kg of cement and 1kg of Coal ash, the stirring rate is 20r / min, and the stirring time is 2-5min, until the surface of coars...

Embodiment 2

[0025] The marble is crushed into gravel with a particle size of 4-8mm and 15-24mm by a double-cavity jaw crusher, and the crushed stone with a particle size of 4-8mm is directly used as fine aggregate, and the particle size is 15-24mm. Spherical or ellipsoid with smooth surface, as fine aggregate; the bulk density of the fine aggregate is 1480kg / m 3 , the porosity is 43%; the bulk density of the coarse aggregate is 1060kg / m 3 , the porosity is 55%;

[0026] Fly ash is waste from power plants, the particle size is 10-20μm, and the bulk density is 210kg / m 3 , the specific surface area is 18.5-19.5m 2 / g, silica content ≥ 90%.

[0027] Mix 8kg of coarse aggregate and 6kg of fine aggregate evenly, spray 12L of water, stir at a rate of 20r / min, and stir for 1-3min to ensure that the surface of the coarse aggregate and fine aggregate is covered with water; add 11kg of cement and 1.6 kg of coal ash, the stirring rate is 20r / min, and the stirring time is 2-5min, until the surface...

Embodiment 3

[0029] The marble is crushed into gravel with a particle size of 4-8mm and 15-24mm by a double-cavity jaw crusher, and the crushed stone with a particle size of 4-8mm is directly used as fine aggregate, and the particle size is 15-24mm. Spherical or ellipsoid with smooth surface, as fine aggregate; the bulk density of the fine aggregate is 1456kg / m 3 , the porosity is 41%; the bulk density of the coarse aggregate is 1030kg / m 3 , with a porosity of 56%

[0030] Fly ash is waste from power plants, the particle size is 10-20μm, and the bulk density is 220kg / m 3 , the specific surface area is 18.5-19.5m 2 / g, silica content ≥ 90%.

[0031] Mix 6kg of coarse aggregate and 5kg of fine aggregate evenly, spray 10L of water, the stirring speed is 20r / min, and the stirring time is 1-3min, to ensure that the surface of coarse aggregate and fine aggregate is covered with water; add 8kg of cement and 1.2 kg of coal ash, the stirring rate is 20r / min, and the stirring time is 2-5min, unt...

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Abstract

The invention discloses a water-permeable concrete formula and a preparation method thereof, and relates to the technical field of building materials. The concrete formula comprises, by mass, 35-55% of cement, 5-8% of fly ash, 0.1-0.2% of calcium oxide, 5-8% of coarse aggregate, 4-6% of fine aggregate, 3-5% of a polymer modifier and the balance water. Accordingly, by adding the polymer modifier, the polymer modifier can be complexed with water and particles in preference to cement colloidal particles, and corrosion of hydrone and ions to concrete is reduced; by adding calcium oxide, the calcium oxide is utilized for reacting with water to generate calcium hydroxide, the volume of calcium hydroxide is expanded to fill up volume shrinkage and collapse caused by concrete hardening, and the water permeability and mechanical function of concrete are maintained or improved; by using a mixture of polished egg-shaped stone and directly crushed gravel, not only can a sufficient amount of cementslurry be contained, but also continuous pores can be formed.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a permeable concrete formula and a preparation method thereof. Background technique [0002] Permeable concrete, also known as permeable concrete, is a building material with continuous pores inside after hardening. Permeable concrete is prepared with aggregate, cement, admixture and water as the main components. Compared with ordinary concrete, its air permeability and water permeability are superior. Permeable concrete was first proposed in the 1950s and has been widely studied. The products obtained from the research have been well applied in many aspects of municipal construction, but the performance of existing permeable concrete still has the following problems to be solved. [0003] One is concrete corrosion. Concrete is corroded by ions and water. A large number of continuous through-holes inside the permeable concrete absorb water from the air or the soil in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/00
CPCC04B28/00C04B2111/00284C04B2201/20C04B2201/50C04B2201/52C04B18/08C04B22/064C04B14/285C04B24/383C04B24/42C04B24/18C04B38/0041
Inventor 于武斌
Owner 山东广发建材制品有限公司
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