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Alkali-activated and nano-enhanced early strength type ultra-high performance concrete and preparation method thereof

A nano-enhanced, ultra-high performance technology used in building materials to achieve significant slip hardening properties, high shear bond strength, and reduced hydration reaction barriers

Inactive Publication Date: 2020-10-30
成都宏基建材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many application scenarios of ultra-high performance concrete, such as the preparation of prefabricated components, repair, reinforcement, etc., need to quickly form strength in the early stage, and it is difficult to meet the needs of these application scenarios due to the need to adopt a large amount of admixture system

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  • Alkali-activated and nano-enhanced early strength type ultra-high performance concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Alkali-activated, nano-reinforced early-strength ultra-high performance concrete is produced by the following method:

[0036] S1. Measure each raw material according to the production raw material formula;

[0037] 665kg of Portland cement, 124kg of silica fume, 184kg of mineral powder, 6kg of nano-silica, 1071kg of quartz sand with a particle size of less than 1mm (599.76kg of 20-40 mesh; 282.74kg of 40-70 mesh; 188.90kg of 70-140 mesh ) 128kg of copper-plated microfilament straight steel fiber, 32kg of twisted steel fiber, 14.685kg of water glass with a modulus of 1.3, 17.13kg of highly dispersed polycarboxylic acid solid water reducing agent with a water reducing rate of 40%, and 176.22kg of tap water;

[0038] The particle size of the nano silica is 19.6nm, the average particle size of silica fume is 0.08 μm, the particle size of mineral powder is 7.3 μm, and the average particle size of Portland cement is 17.7 μm;

[0039] The Portland cement is P.I 52.5R Portlan...

Embodiment 2

[0050] Alkali-activated, nano-reinforced early-strength ultra-high performance concrete is produced by the following method:

[0051] S1. Measure each raw material according to the production raw material formula;

[0052] 719.2kg of Portland cement, 111.4kg of silica fume, 182.3kg of mineral powder, 7kg of nano-silica, 1071kg of quartz sand with a particle size of less than 1mm (599.76kg of 20-40 mesh; 282.74kg of 40-70 mesh; 70-140 mesh Mesh 188.90kg) 112kg of copper-plated microfilament straight steel fiber, 28kg of twisted steel fiber, 15.20kg of water glass with a modulus of 1.2, 17.85kg of highly dispersed polycarboxylate solid water reducer with a water reducing rate of 40%, and 183.58 of tap water kg;

[0053] The particle size of the nano silica is 19.6nm, the average particle size of silica fume is 0.08 μm, the particle size of mineral powder is 7.3 μm, and the average particle size of Portland cement is 17.7 μm;

[0054] The Portland cement is P.I 52.5R Portland c...

Embodiment 3

[0065] Alkali-activated, nano-reinforced early-strength ultra-high performance concrete is produced by the following method:

[0066] S1. Measure each raw material according to the production raw material formula;

[0067] 660kg of Portland cement, 105kg of silica fume, 204kg of mineral powder, 5kg of nano-silica, 1074kg of quartz sand with a particle size of less than 1mm (of which 20-40 mesh 601.44kg; 40-70 mesh 283.53kg; 70-140 mesh 188.90kg ) 128kg of copper-plated microfilament straight steel fiber, 32kg of twisted steel fiber, 14.685kg of water glass with a modulus of 1.3, 17.13kg of highly dispersed polycarboxylic acid solid water reducer with a water reducing rate of 40%, and 180.19kg of tap water;

[0068] The particle size of the nano silica is 19.6nm, the average particle size of silica fume is 0.08 μm, the particle size of mineral powder is 7.3 μm, and the average particle size of Portland cement is 17.7 μm;

[0069] The Portland cement is P.I 52.5R Portland cemen...

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Abstract

The invention discloses a preparation method of alkali-activated and nano-enhanced early strength type ultra-high performance concrete. The concrete is characterized in that the formula comprises theproduction raw materials in parts by mass: 650-720 parts of Portland cement, 95-130 parts of silica fume, 165-185 parts of mineral powder, 5-10 parts of nano silicon dioxide, 1050-1075 parts of quartzsand, 96-128 parts of straight steel fibers, 24-32 parts of torsional steel fibers, 13.725-15.54 parts of water glass with modulus of 1.2-1.3, 13.75-18.13 parts of a water reducing agent and 154.7-202 parts of water. The method has the advantage that the liquidity and early strength of the ultra-high performance concrete are remarkably improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a concrete material and a preparation method thereof. Background technique [0002] Concrete is the most widely used building material in contemporary times. However, ordinary concrete has the disadvantages of heavy weight, high brittleness and low strength. Ultra-high performance concrete (UHPC) is a cement-based composite material with ultra-high compressive strength, high flexural strength, and high toughness. The fineness and activity of the material minimize the internal defects of the material, so as to obtain ultra-high strength and ultra-high durability. [0003] Since the water consumption of ultra-high performance concrete is extremely low, which is far lower than the water consumption required for cement hydration, a large number of unhydrated cement particles in ultra-high performance concrete are only used as filling materials for the system. In order to reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B40/02
CPCC04B28/04C04B40/024C04B2201/50C04B2201/52C04B14/06C04B14/48C04B14/062C04B12/04C04B18/141C04B18/146C04B2103/302
Inventor 张林涛韩建国吴涛何芝恒
Owner 成都宏基建材股份有限公司
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