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An Artificial Sand Concrete with Improving Pumping Performance

A technology of pumping performance and artificial sand, applied in the field of artificial sand concrete, can solve the problems of poor concrete pumping performance, unstable concrete quality, easy occurrence of bleeding and segregation, etc., so as to reduce the amount of cement and improve the anti-segregation ability. , reduce the effect of mining

Active Publication Date: 2019-06-21
广西南宁嘉泰水泥制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when gravel artificial sand is used to make concrete, it is easy to cause unstable concrete quality, bleeding and segregation, resulting in poor workability of concrete, poor concrete pumping performance, short pumping distance, and resulting A series of problems such as pump tube blockage

Method used

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  • An Artificial Sand Concrete with Improving Pumping Performance
  • An Artificial Sand Concrete with Improving Pumping Performance
  • An Artificial Sand Concrete with Improving Pumping Performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Artificial sand selection:

[0038] The artificial sand raw stone used in the concrete of this embodiment is preferably basalt, and its sand making process is:

[0039] After the vegetation and overburden are removed in the quarry, the holes are drilled and blasted in stages, and sent to the receiving pit of the primary crushing workshop for primary crushing by a rotary crusher and a jaw crusher, and secondary crushing by a secondary crusher after primary crushing. After the primary crushing, the crushed stones with a material diameter of less than 35mm are screened and sent to the vertical shaft impact crusher to obtain sand particles with a particle diameter of less than 5mm.

[0040] Sieve the sand with particle size less than 5mm to get 0.5-5mm basalt coarse sand, 0.2-0.5mm basalt medium sand, 0.05-0.2mm basalt fine sand, and 0.05mm basalt ultra-fine sand.

[0041] The 0.2-0.5mm basalt medium sand is pretreated. The pretreatment process is: put the 0.2-0.5mm basalt m...

Embodiment 2

[0049] Adopt the method among the embodiment 1 to prepare the basalt coarse sand of 0.5~5mm, the basalt medium sand of 0.2~0.5mm, the basalt fine sand of 0.05~0.2mm, the basalt ultra-fine sand below 0.05mm; The sand in the basalt was combined with hydroxypropyl methylcellulose, and the basalt fiber was prepared according to the method described in Example 1.

[0050] The basalt artificial sand is prepared by using basalt coarse sand, basalt superfine sand, basalt superfine sand and basalt fiber in weight percentages of 22%: 65%: 5%: 8%.

[0051] The raw materials were weighed according to the following parts by weight: 280 parts of cement, 110 parts of coal ash, 987 parts of stone, 825 parts of basalt artificial sand, 182.5 parts of water and 6.4 parts of admixture.

[0052] After configuring the raw materials, the concrete of this embodiment was prepared according to the method of Embodiment 1.

[0053] According to the proportion of Example 2, concrete with a strength grade...

Embodiment 3

[0055] Artificial sand selection:

[0056] Adopt the method among the embodiment 1 to prepare the basalt coarse sand of 0.5~5mm, the basalt medium sand of 0.2~0.5mm, the basalt fine sand of 0.05~0.2mm, the basalt ultra-fine sand below 0.05mm; The sand in the basalt was combined with hydroxypropyl methylcellulose, and the basalt fiber was prepared according to the method described in Example 1.

[0057] The basalt artificial sand is prepared by using basalt coarse sand, basalt superfine sand, basalt superfine sand and basalt fiber in weight percentages of 20%: 62%: 6%: 7%.

[0058] The raw materials were weighed according to the following parts by weight: 310 parts of cement, 100 parts of coal ash, 992 parts of stone, 812 parts of basalt artificial sand, 180 parts of water and 7.2 parts of admixture.

[0059] After configuring the raw materials, the concrete of this embodiment was prepared according to the method of Embodiment 1.

[0060] According to the proportion of Exampl...

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Abstract

The invention discloses manufactured sand concrete capable of improving the pumping performance. The manufactured sand concrete is prepared from the following components in parts by weight: 250-310 parts of cement, 100-120 parts of coal ashes, 986-988 parts of stones, 874-775 parts of manufactured sand, 180-185 parts of water and 5.6-7.2 parts of an admixture, wherein the admixture contains 2% of air entraining agent and 5% of a retarder. Through proportion adjustment, the bleeding rate of the concrete is reduced; the bleeding rate is reduced, the viscosity of the concrete is improved and the segregation resistance is improved at the same time; the concrete has good flowing property in the transportation process; and meanwhile, the setting time of the concrete can be prolonged, the plasticity of fresh concrete can be kept for a relatively long period of time and pumping blockage of concrete setting caused by an overlong storage period is avoided.

Description

technical field [0001] The invention relates to the technical field of concrete construction, in particular to an artificial sand concrete with improved pumping performance. Background technique [0002] Due to the current shortage of natural river sand in the market, in response to the sustainable development strategy, local governments are vigorously promoting the use of crushed artificial sand instead of natural river sand. However, when gravel artificial sand is used to make concrete, it is easy to cause unstable concrete quality, bleeding and segregation, resulting in poor workability of concrete, poor concrete pumping performance, and short pumping distance, which in turn causes A series of problems such as pump tube blockage. Contents of the invention [0003] In summary, in order to overcome the deficiencies of the prior art, the object of the present invention is to provide an artificial sand concrete with improved pumpability, which not only reduces the bleeding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B24/20C04B103/22
CPCC04B28/00C04B40/0039C04B2103/22C04B2201/50C04B18/08C04B14/04C04B14/4643C04B2103/302C04B2103/304C04B24/18C04B24/20C04B24/16C04B18/248
Inventor 胡海力黄志钢周代祥
Owner 广西南宁嘉泰水泥制品有限公司
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