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Machine-made sand C120 ultra-high-strength concrete easily pumped to super high-rise

A technology of ultra-high-strength concrete and machine-made sand, applied in the field of building materials and concrete, can solve the problems of shortage of natural sand resources, limited application scope, rough surface morphology, etc., and achieve the effect of improving poor gradation

Inactive Publication Date: 2018-06-12
中建西部建设贵州有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to design a machine-made sand C120 ultra-high-strength concrete that is easy to be pumped in super-high-rise buildings, use machine-made sand instead of natural sand as fine aggregate, and do not use fiber reinforcements, and choose to match machine-made sand conventional gel material, to solve the problem of shortage of natural sand resources in the prior art using natural sand as raw material, to solve the prior art due to the polyhedral prism of machine-made sand, rough surface appearance and high powder content that affect the configuration of concrete needs High water rate, easy segregation, poor pumpability, and the strength grade does not meet the requirements of ultra-high performance concrete, which limits the application range

Method used

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  • Machine-made sand C120 ultra-high-strength concrete easily pumped to super high-rise
  • Machine-made sand C120 ultra-high-strength concrete easily pumped to super high-rise
  • Machine-made sand C120 ultra-high-strength concrete easily pumped to super high-rise

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Effect test

Embodiment 1

[0022] A machine-made sand C120 ultra-high-strength concrete that is easy to pump in super-high-rise buildings. The dosage ratio and performance of the concrete are as follows:

[0023]

[0024]

[0025] The machine-made sand is basalt machine-made sand with a fineness modulus of 2.8, a bottom powder content of 4%, and an MB value of 0.8. The MB value is the sub-blue value, which indicates the mud content in the machine-made sand. The gravel is limestone with a particle size of 5-20mm and a mud content of 1.1%. The admixture is a viscosity-reducing polycarboxylic acid composite admixture with a water reducing rate of 35%.

[0026] Preparation method: adopt the conventional concrete preparation method, put limestone gravel and basalt machine-made sand into the concrete mixer, add half of the water for wet mixing for 30-40 seconds, then put cement and mineral admixtures into the mixing pot, and wet mix for 30-40 seconds 40s, and finally dissolve the admixture in the rema...

Embodiment 2

[0029] A machine-made sand C120 ultra-high-strength concrete that is easy to pump in super-high-rise buildings. The dosage ratio and performance of the concrete are as follows:

[0030]

[0031] The machine-made sand is limestone machine-made sand with a fineness modulus of 2.9, a bottom powder content of 3%, and an MB value of 1.0. The MB value is the sub-blue value, which indicates the mud content in the machine-made sand. The crushed stone is limestone crushed stone with a particle size of 5-20mm and a mud content of 0.8%. The admixture is a viscosity-reducing polycarboxylic acid composite admixture with a water reducing rate of 35%.

[0032] Preparation method: adopt the conventional concrete preparation method, put limestone gravel and limestone machine-made sand into the concrete mixer, add half of the water and mix for 30-40s, then put cement and mineral admixtures into the mixing pot, wet mix for 30- 40s, and finally dissolve the admixture in the remaining half of...

Embodiment 3

[0035] A machine-made sand C120 ultra-high-strength concrete that is easy to pump in super-high-rise buildings. The dosage ratio and performance of the concrete are as follows:

[0036]

[0037] The machine-made sand is limestone machine-made sand with a fineness modulus of 3.0, a bottom powder content of 4%, and an MB value of 1.0. The MB value is the sub-blue value, which indicates the mud content in the machine-made sand. The gravel is diabase gravel with a particle size of 5-20mm and a mud content of 1.0%. The admixture is a viscosity-reducing polycarboxylic acid composite admixture with a water reducing rate of 35%.

[0038]Preparation method: adopt the conventional concrete preparation method, put the diabase gravel and limestone machine-made sand into the concrete mixer, add half of the water and mix for 30-40s, then put the cement and mineral admixture into the mixing pot, wet mix 30-40s, and finally dissolve the admixture in the remaining half of the water and ad...

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Abstract

The invention discloses a machine-made sand C120 ultra-high-strength concrete easily pumped to a super high-rise. The ultra-high-strength concrete is prepared from, by content per cubic meter, 380-480kg / m3 of cement, 100-200kg / m3 of spherical volcanic ash gel material, 80-160kg / m3 of granulated blast slag, 40-60kg / m3 of siliceous tephros gel material, 560-750kg / m3 of machine-made sand, 900-1200kg / m3 of gravel, 16-25kg / m3 of additive, and 125-150kg / m3 of water. The ultra-high-strength concrete adopts machine-made sand as fine aggregate, and is prepared from regular gel material instead of doping with fiber enhancer; thus the 28d compressive strength reaches C120 intensity grade, the slump is more than 260mm, the divergence is more than 680mm, and the rewinding time is less than 3s; the ultra-high-strength concrete can meet the requirement of pumping construction of the super high-rise, and has the advantages of being high in intensity grade, low in viscosity, and easy to perform the super high-rise pumping.

Description

technical field [0001] The invention relates to the field of building material concrete, and specifically provides machine-made sand C120 super-high-strength concrete which is easy to be pumped in super-high buildings. Background technique [0002] With the continuous deepening of economic globalization, China has set off a boom in skyscraper construction. Many cities regard super high-rise buildings as city business cards, city landmarks, and symbols of urban development. The preparation and pumping of ultra-high-strength concrete for super-high-rise pumping Technology has become a hot spot in the concrete industry. [0003] In order to meet the high requirements of the construction industry for building materials, some ultra-high-performance concrete has been developed. The specific applications for Chinese patents are: Patent Application No. 201310670490.1 "Ultra-high-strength Concrete with Low Viscosity and Easy Pumping with an Average Strength of 120MPa", Patent Applica...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2111/00146C04B2201/50C04B18/08C04B18/141C04B14/06C04B18/0427C04B18/146C04B2103/0068C04B14/28C04B14/02
Inventor 赵士豪林喜华张广智何德军柯旭孙庆云
Owner 中建西部建设贵州有限公司
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