High-strength fiber pervious concrete road pavement brick and preparation method thereof

Abstract

The invention relates to a high-strength fiber pervious concrete pavement brick and a preparation method thereof. The high-strength fiber pervious concrete pavement brick is formed by stirring, distributing, extruding materials such as single-sized aggregate (quartz sand, broken stones), P.O42.5 cement, modified polypropylene fiber as a reinforcing material, an air-entraining hardening accelerator, and water. The aggregate gradation has no continuity, a large quantity of connecting pores exist in a structure, so the pervious concrete pavement brick is a porous concrete product with a large quantity of non-closed pores inside. During the rain or when water is accumulated on a road surface, the water can successfully permeate into the underground or is temporarily stored in a pervious subgrade along the perforative 'paths' in the pervious concrete pavement brick and then is further drained.

Description

Technical field [0001] The invention belongs to the field of building materials, in particular to a high-strength fiber permeable concrete pavement brick and a preparation method thereof. Background technique [0002] At present, the compressive strength of permeable concrete pavement bricks developed in China is generally around 30MPa, which cannot meet the requirements of compressive strength Cc50 specified in the national building materials industry standard "Permeable Bricks" (JC / T945-2005). The reasons are: 1. The main factors affecting the performance of permeable bricks are aggregate gradation, surface permeable mortar and cement ratio, water-cement ratio, surface thickness and final product compactness, traditional river sand, river sand The range of gradation is wide, and the compactness after being combined with cement can not meet the requirements of water permeability, especially the choice of surface layer permeable mortar aggregate is the key point that determines w...

AI Technical Summary

Problems solved by technology

3. The determination of the distribution parameters and molding parameters of the concrete pavement brick molding machine becomes the third important factor. If the number of distribution and the main shock time of the molding are increased, the density of the concrete in the mold box will increase, and the strength of the produced permeable concrete will increase. Increase the water permeability and decrease, conversely, the strength decreases and the water permeability coefficient increases

[0003] Therefore, existing permeable concrete pavement bricks have many shortcomings that are difficult to overcome, which greatly affects the application and development of permeable concrete pavement bricks.