Ultra-high ductility cement-based materials for repair and reinforcement

A cement-based material, repair and reinforcement technology, applied in the field of building materials, can solve problems such as poor ductility and uncontrollable setting time, and achieve the effects of improving ductility, toughness and flexural strength

Active Publication Date: 2021-11-12
南京绿色增材智造研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides an ultra-high ductility cement-based material for repair and reinforcement, which has controllable setting time, high ductility and strong durability, and solves the problem of poor ductility of common repair and reinforcement cement-based materials, The problem of uncontrollable coagulation time

Method used

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  • Ultra-high ductility cement-based materials for repair and reinforcement

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Embodiment 1

[0023] This embodiment provides an ultra-high ductility cement-based material for repair and reinforcement, which consists of the following components by mass: 200 parts of cement, 200 parts of mineral powder, 100 parts of steel slag powder, 50 parts of lithium slag powder, and 50 parts of zeolite powder , 1400 parts of natural sand with a particle size of less than 1.25mm and a crushing value of less than 8%, 100 parts of water, 10 parts of nano-titanium dioxide, and 10 parts of microcapsules (the core material of the microcapsules consists of 20 parts of starch glue, 30 parts of silica sol, 10 parts of silane coupling agent and 40 parts of water), 20 parts of PVA fiber, 30 parts of titanium white slag, 60 parts of auxiliary agent solution composed of sodium hydroxide and sodium silicate solution (sodium hydroxide and sodium silicate solution The ratio is 4:6), 10 parts of glycerin modified pure acrylic emulsion, 50 parts of lightly burned nickel-iron slag at 500 °C.

Embodiment 2

[0025] This embodiment provides an ultra-high ductility cement-based material for repair and reinforcement, which is composed of the following components by mass: 50 parts of cement, 150 parts of mineral powder, 50 parts of steel slag powder, and 50 parts of lithium slag powder, with a particle size of less than 1.25 mm, 700 parts of quartz sand with a crushing value less than 8%, 600 parts of water, 2 parts of nano-alumina, and 2 parts of microcapsules (the core material of the microcapsules consists of 40 parts of starch glue, 10 parts of silica sol, and 15 parts of silane Coupling agent and 35 parts of water), 1 part of PE fiber, 10 parts of titanium white slag, 30 parts of auxiliary agent solution composed of sodium hydroxide and sodium silicate solution (the ratio of sodium hydroxide to sodium silicate solution is 3 :7), 50 parts of glycerol-modified pure acrylic emulsion, 10 parts of lightly burned nickel-iron slag at 900°C.

Embodiment 3

[0027] This embodiment provides an ultra-high ductility cement-based material for repair and reinforcement, which is composed of the following components by mass: 400 parts of mineral powder, 100 parts of steel slag powder, 100 parts of lithium slag powder, the particle size is less than 1.00mm, crushed 1000 parts of regenerated copper slag sand with a value of less than 8%, 400 parts of water, 3 parts of nano-titanium dioxide, 5 parts of nano-alumina, and 8 parts of microcapsules (the core material of the microcapsules consists of 10 parts of starch glue, 40 parts of silica sol, 5 parts of silane coupling agent and 45 parts of water), 18 parts of PVA fiber, 20 parts of titanium white slag, 50 parts of additive solution composed of sodium hydroxide, sodium carbonate, sodium formate and sodium silicate solution (sodium hydroxide, The ratio of sodium carbonate, sodium formate and sodium silicate solution is 3:1:1:5), 40 parts of glycerin modified pure acrylic emulsion, 30 parts o...

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Abstract

The invention relates to the technical field of building materials, and discloses an ultra-high ductility cement-based material for repair and reinforcement, which consists of the following components by mass: 300-600 parts of cementitious material; 700-1400 parts of aggregate; 100-300 parts of water 2~10 parts of nanoparticles; 1~10 parts of microcapsules; 1~20 parts of PVA and / or PE fiber; 10~30 parts of titanium white slag; 30~60 parts of auxiliary agent solution; 10-50 parts of lightly burned ferronickel slag; wherein, the core material of the microcapsules is a mixture of starch gel, silica sol, silane coupling agent and water, and the mass ratio is 10-40:10-40:5-15 : 10~50. The repairing and strengthening ultra-high ductility cement-based material of the invention has controllable setting time, high ductility and strong durability, and solves the problems of poor ductility and uncontrollable setting time of common repairing and strengthening cement-based materials.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an ultra-high ductility cement-based material for repair and reinforcement. Background technique [0002] The general requirements for cement-based materials for repair and reinforcement of bridges, roads, and buildings are fast-setting early strength, high flexural strength, and high ductility, while the requirements for compressive strength are low. Rapid hardening and early strength are easy to achieve for cement-based materials, but high flexural resistance and high ductility are bottlenecks that are difficult to break through for concrete materials. As a heterogeneous and heterogeneous material, concrete has a very low flexural strength, only about 1 / 10 of its compressive strength, which limits its application. [0003] At present, in order to improve the flexural and deformation (ductility) capabilities of repairing and strengthening cement-based materials, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/24
CPCC04B28/24C04B2201/50C04B7/00C04B18/141C04B18/142C04B14/047C04B14/068C04B22/002C04B14/305C04B16/0641C04B18/0481C04B22/062C04B12/04C04B18/144C04B24/2641C04B20/0008C04B24/38C04B24/42C04B14/06C04B14/303C04B16/0625C04B22/10C04B24/04
Inventor 张亚梅李保亮陈春张培根孙正明
Owner 南京绿色增材智造研究院有限公司
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