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Manufactured sand concrete containing steel fibers

A technology of machine-made sand and concrete, which is applied in the field of concrete preparation, can solve the problems of unfavorable long-distance transportation, non-renewable, etc., and achieve the effects of improving the failure form, improving brittle failure, and reducing production costs

Inactive Publication Date: 2019-01-11
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the preparation of concrete, natural sand is used in most areas of my country, and natural sand is a local resource, which cannot be regenerated in the short term and is not conducive to long-distance transportation.

Method used

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  • Manufactured sand concrete containing steel fibers
  • Manufactured sand concrete containing steel fibers
  • Manufactured sand concrete containing steel fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] A machine-made sand concrete containing steel fibers, the raw material contains the following components in the following parts by weight: 16 groups of experiments are carried out through orthogonal experiments to determine the most suitable ratio;

[0023] The mixing process adopts: pre-mix the materials other than the fiber evenly, then add the fiber for mixing, then add cement and water for mixing, the mixing diagram is as follows figure 1 As shown, prepared;

[0024] The prepared concrete was tested, and its slump and expansion are shown in Table 2.

[0025] Table 1 Concrete material consumption per square meter

[0026]

[0027]

[0028] Table 2 Measured slump and expansion

[0029]

[0030] The prepared concrete was tested, and its 7-day and 28-day compressive and splitting tensile strengths are shown in Table 3.

[0031] Table 3 Measured 7d, 28d compressive and splitting tensile strength

[0032]

[0033] Combining Table 1-3, it can be seen that: ...

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PUM

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Abstract

The invention discloses a manufactured sand concrete containing steel fibers. The manufactured sand concrete containing steel fibers comprises broken stones, manufactured sands and cement according toa routine ratio, the manufactured sands are a residual material obtained after utilization of local materials or production f coarse aggregates, the manufactured sands produced by using a special sand making machine are used as the fine aggregates of the concrete, and the steel fibers are RPC steel fibers. Natural sands are replaced with the manufactured sands, so the source of sands is enriched,wastes are changed into valuables, and the production cost is reduced; and the concrete containing steel fibers is produced from the manufactured sands, and the steel fibers are added to the manufactured sands to ensure the strength of the manufactured sand concrete in order to make the manufactured sand concrete applied to bridges and other high-strength structures, so the production cost can besignificantly reduced, and the resources of the manufactured sands can be fully utilized to protect the environment.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a machine-made sand steel fiber concrete. Background technique [0002] At present, in concrete preparation, natural sand is used in most areas of my country, and natural sand is a local resource, which cannot be regenerated in the short term and is not conducive to long-distance transportation. With the increasing development of my country's infrastructure construction, the quality of natural sand resources in many areas of my country has declined, and indicators such as mud content or gradation do not meet engineering needs. At the same time, natural sand resources are scarce in many areas, and even no sand is available. , the contradiction between supply and demand of concrete sand is particularly prominent. [0003] Due to the gradual shortage of natural sand resources, rising prices, inconvenient transportation in mountainous areas, and difficulties in road tran...

Claims

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Application Information

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IPC IPC(8): C04B28/02
CPCC04B28/02C04B2201/50C04B14/48C04B14/02C04B14/06C04B2103/302C04B18/146C04B18/08
Inventor 张广兴孙兆会孙胜伟高江郑延莉付兆岗吴忠良刘大伟王丽君郁慕贤董轶王建涛
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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