Inorganic-organic composite powder reinforcing agent for pervious concrete and application of inorganic-organic composite powder reinforcing agent

Abstract

The invention relates to an inorganic-organic composite powder reinforcing agent for pervious concrete and application of the inorganic-organic composite powder reinforcing agent. The reinforcing agent comprises the following components in parts by weight: 66-71 parts of silica fume, 18-22 parts of redispersible latex powder, 10-11 parts of an early strength agent, 0.7-0.9 part of a water reducing agent and 0.01-0.05 part of a [beta]-cyclodextrin-carbon nanotube compound, and during application, the reinforcing agent is added in the mixing process of pervious concrete, and the mixing amount of the reinforcing agent is 4-6% of the mass of cement. Compared with the prior art, the preparation method has the advantages that inorganic reinforcing and organic toughening composite modification methods are combined, and specific components are mixed according to a certain proportion, so that the cohesion performance and the adhesion performance of cement mortar can be effectively improved, and the compressive strength and the breaking strength of the pervious concrete are improved on the premise of keeping the same porosity; and the freeze-thaw durability is also well improved.

Description

technical field [0001] The invention belongs to the technical field of permeable concrete modifiers, and relates to an inorganic-organic composite powder reinforcing agent for permeable concrete and its application. Background technique [0002] Permeable concrete pavement has excellent environmental benefits, and the use of reinforcing agents can generally increase its compressive strength to C30. In order to develop pervious concrete for medium and heavy-duty traffic, there is still room for improvement in its mechanical properties and durability. In the case of ensuring a certain porosity, there are three ways to improve the performance of pervious concrete: ① improving the performance of the gelling system; ② improving the performance of the interface transition zone; ③ increasing the number and area of ​​contact points. In the final analysis, these three methods are to improve the performance of cement mortar. The performance of cement mortar is improved by adding rein...

AI Technical Summary

Problems solved by technology

In addition, due to its insufficient flexural strength, pervious concrete is prone to fracture and other diseases, and most reinforcing agents have a good effect on enhancing the compressive strength of pervious concrete, but the impact on the flexural strength is not clear or the effect is not good.

[0004] Therefore, it is very important to strengthen and toughen pervious concrete, and the existing reinforcing agents cannot meet the above requirements

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