Air entrained concrete

A technology of concrete and air content, which is applied in the field of concrete, can solve the problems of reducing the strength of concrete, the influence of air-entraining agents on the durability of concrete is rarely considered, and the major technical and economic benefits of air-entraining agents are not clearly understood, so as to improve the strength, Ensure traffic capacity and comfort, reduce maintenance costs
CN103102129AInactive Publication Date: 2013-05-15HEILONGJIANG PROV INST OF COMM
4 Cites 14 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEILONGJIANG PROV INST OF COMM
Publication Date
2013-05-15
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides an air entrained concrete and relates to a concrete. The air entrained concrete provided by the invention comprises cement, a fine aggregate, a coarse aggregate, an additive and water, wherein the additive accounts for 2-3 wt% of the cement. The air entrained concrete provided by the invention can be used in paving to improve performances such as strength and impermeability, so as to greatly improve the durability of the pavement, greatly reduce the cost of repair and maintenance, and ensure the traffic capacity and comfort of the road. The main technical parameters of the air entrained concrete are as follows: 1) design flexural strength of the air entrained concrete: >=5.0Mpa; 2) gas content of the air entrained concrete: 5.5 + / - 0.5%; 3) water-cement ratio (W / C) of the air-entrained concrete: <=0.40; 4) slump of the air entrained concrete mixture: 25-50mm; 5) flexural elastic modulus of the air entrained concrete: >=30000Mpa; and 6) antifreeze grade of the concrete: >=F300.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a concrete, in particular to a concrete using an air-entraining agent. Background technique

[0002] There are different degrees of poor durability of pavement concrete in cold regions of our country. Many highways, urban roads and overpass projects cannot reach the design service life, that is, durability damage such as frost heave peeling, local peeling, and surface wear occurs. Having to carry out frequent repairs and renovations will inevitably cost a huge amount of maintenance and reconstruction costs, resulting in a great waste of energy and resources.

[0003] Cement concrete pavement in cold regions is often broken and damaged prematurely under the action of ice and snow freezing and thawing, which is far from reaching the service life of the design index. According to expert analysis, one of the main reasons for shortening the service life of roads in cold regions is the frost heave of the subgrade and the freeze-thaw...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More