New ultrafine sand concrete

Abstract

The invention discloses new ultrafine sand concrete. The new ultrafine sand concrete comprises the following components in parts by weight: 1.3 parts of cementing material, 1.5 parts of fine aggregate, 4 parts of coarse aggregate, 0.01 part of high efficiency water reducing agent and 0.32 part of water. The ultrafine sand concrete also contains expanding agent, water reducing agent, grinding aid, surfactant and reinforced fiber. By adopting the coordination of various components, particularly adding the reinforced fiber in the ultrafine sand concrete disclosed by the invention, the technical defect of the prior art that concrete is easy to crack can be overcome, the anti-seepage function of concrete can be enhanced and the cracking of concrete can be inhibited.

Description

technical field

[0001] The invention relates to a kind of concrete for construction, in particular to a crack-resistant superfine sand concrete. Background technique

[0002] In the field of engineering construction in Chongqing, most of the sand used in the preparation of concrete is ultra-fine sand. Concrete and mortar made of ultra-fine sand often crack with the change of season and temperature, which affects the quality and service life of the project, and has become a long-standing and difficult problem to solve. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide an ultra-fine sand concrete that can effectively prevent cracking.

[0004] In order to solve the above problems, the present invention provides the following technical solutions: a novel ultra-fine sand concrete, comprising the following materials, the mass ratio of which is 1.3 parts of cementitious material, 1.5 parts of fine aggregate, and 4 parts...

Examples

Embodiment Construction

[0016] The extra-fine sand concrete of the present invention is composed of the following materials, the mass ratio of which is 1.3 parts of cementitious material, 1.5 parts of fine aggregate, 4 parts of coarse aggregate, 0.01 part of high-efficiency water reducer, and 0.32 part of water; Concrete materials include cement, slag powder, fly ash, and silica sand powder. The mass composition is 0.9 parts of cement, 0.1 part of slag powder, 0.1 part of fly ash, and 0.3 parts of silica sand powder;

[0017] The coarse aggregate is crushed stone with a particle size of 5-31.5mm; the fine aggregate is ultra-fine sand with a fineness modulus of 0.8-1.1; the cement is ordinary Portland cement with a strength grade of not less than 42.5, mineral powder, The specific surface area of ​​fly ash and silica sand powder is 400~500m 2 / kg, the moisture content of silica sand powder is less than 1.0%, and the SiO2 content is not less than 90%.

[0018] The ultra-fine sand concrete also include...

technical field

[0001] The invention relates to a kind of concrete for construction, in particular to a crack-resistant superfine sand concrete. Background technique

[0002] In the field of engineering construction in Chongqing, most of the sand used in the preparation of concrete is ultra-fine sand. Concrete and mortar made of ultra-fine sand often crack with the change of season and temperature, which affects the quality and service life of the project, and has become a long-standing and difficult problem to solve. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide an ultra-fine sand concrete that can effectively prevent cracking.

[0004] In order to solve the above problems, the present invention provides the following technical solutions: a novel ultra-fine sand concrete, comprising the following materials, the mass ratio of which is 1.3 parts of cementitious material, 1.5 parts of fine aggregate, and 4 parts...

Examples

Embodiment Construction

[0016] The extra-fine sand concrete of the present invention is composed of the following materials, the mass ratio of which is 1.3 parts of cementitious material, 1.5 parts of fine aggregate, 4 parts of coarse aggregate, 0.01 part of high-efficiency water reducer, and 0.32 part of water; Concrete materials include cement, slag powder, fly ash, and silica sand powder. The mass composition is 0.9 parts of cement, 0.1 part of slag powder, 0.1 part of fly ash, and 0.3 parts of silica sand powder;

[0017] The coarse aggregate is crushed stone with a particle size of 5-31.5mm; the fine aggregate is ultra-fine sand with a fineness modulus of 0.8-1.1; the cement is ordinary Portland cement with a strength grade of not less than 42.5, mineral powder, The specific surface area of ​​fly ash and silica sand powder is 400~500m 2 / kg, the moisture content of silica sand powder is less than 1.0%, and the SiO2 content is not less than 90%.

[0018] The ultra-fine sand concrete also include...