Cement based powder and application thereof in cement concrete and in highway construction

Abstract

The invention discloses cement based powder and application thereof in cement concrete and in highway construction, belongs to the field of construction materials, and aims at solving the problem of low breaking strength of the existing cement concrete pavement, prolonging the service life, lengthening the distance of cutting joints in the cement pavement, even producing a cement pavement without cutting joints, improving the driving comfort, reducing noise and the like. The cement based powder is prepared from the following components in parts by weight: 100 parts of waste rubber granules having an average grain size not less than 10 meshes, 3-50 parts of inorganic inert powder having an average grain size not less than 10 meshes and 0.2-5 parts of a fiber material. The method for preparing the cement based powder comprises the following steps: (1) mixing and stirring the inert inorganic powder material, waste rubber granules and fiber material; and (2) treating the mixture in the step (1) by a physical method to embed the inert inorganic powder and fiber material into the waste rubber powder.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a cement-based powder and its application on concrete and roads. Background technique [0002] A large amount of waste rubber products such as waste tires will be produced in the world every year, which not only pollutes the environment but also causes a waste of resources. The research on the new type of concrete prepared by using polymer materials as the constituent materials of cement concrete was carried out in 1997 by Arizona State University Civil Engineering The Department of Environment has been carried out, and the following viewpoints have been put forward in terms of theory: 1. The polymer material is regarded as a light-weight and easily deformed fine sand aggregate; 2. The polymer material, as a group of tiny stretchable particles distributed inside the concrete, will intercept The microscopic cracks of concrete, in general, prevent or slow down the expansion of mic...

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Problems solved by technology

Therefore, it is necessary to set up corresponding cutting seams to adapt to its deformation and prevent cracks. The distance between the existing shrinkage joints is generally 4-6 meters, and the distance between longitudinal joints is generally 3-4.5 meters. Due to the existence of shrinkage joints, it increases on the one hand reduce the construction cost of the road surface, on the other hand, the driving comfort of the road surface is reduced, especially in airports and military sites, there is an urgent need for a road surface without cutting seams

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