Fast hardening early strength type composite repair mortar

A repair mortar and early-strength technology, which is applied in the field of building materials, can solve the problems of repair mortar strength shrinkage, large drying shrinkage, and low bonding strength, and achieve improved bonding performance, dry shrinkage, and strong bonding Effect

Inactive Publication Date: 2019-03-08
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a fast-hardening and early-strength composite repair mortar, which solves the problems of repair mortar strength shrinkage, large drying shrinkage and low bonding strength in the prior art

Method used

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  • Fast hardening early strength type composite repair mortar
  • Fast hardening early strength type composite repair mortar
  • Fast hardening early strength type composite repair mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A rapid-hardening and early-strength composite repair mortar, consisting of the following components in weight percentage:

[0033] Water 5%, cement 20%, silica fume 1%, fly ash 2%, quartz sand 70% (coarse sand 25%, medium sand 25%, fine sand 20%), composite early strength agent 0.4% (A component : lithium carbonate 0.21%, B component: triethanolamine: 0.01% and aluminum sulfate: 0.22%), water reducer 0.06%, rubber powder 1.48%, hybrid fiber 0.06% (basalt fiber 0.05%, polypropylene fiber 0.01%) , the particle size of coarse sand is 2.36-4.75mm, the particle size of medium sand is 1.18-2.36mm, and the particle size of fine sand is 0.6-1.18mm.

[0034] Its preparation method comprises the following steps:

[0035] S1. According to the above formula of a fast-hardening and early-strength composite repair mortar, weigh each component for later use;

[0036]S20: mechanically milling and activating the fly ash to a particle size of 200 mesh to obtain activated fly ash, and ...

Embodiment 2

[0046] A rapid-hardening and early-strength composite repair mortar, consisting of the following components in weight percentage:

[0047] Water 7.29%, cement 22.25%, silica fume 2.47%, fly ash 1.3%, quartz sand 65.05% (coarse sand: 25.13%; medium sand: 21.16%; fine sand 18.76%), composite early strength agent 0.44% (A Component: lithium carbonate 0.21%, B component: triethanolamine 0.01%, aluminum sulfate 0.22%), water reducer 0.08%, rubber powder 1.05%, hybrid fiber 0.07% (basalt fiber 0.06%, polypropylene fiber 0.01), The particle size of coarse sand is 2.36-4.75mm, the particle size of medium sand is 1.18-2.36mm, and the particle size of fine sand is 0.6-1.18mm.

[0048] Its preparation method comprises the following steps:

[0049] S1. According to the above formula of a fast-hardening and early-strength composite repair mortar, weigh each component for later use;

[0050] S20: mechanically milling and activating the fly ash to a particle size of 200 mesh to obtain acti...

Embodiment 3

[0060] A rapid-hardening and early-strength composite repair mortar, consisting of the following components in weight percentage:

[0061] Water 6.79%, cement 20.75%, silica fume 2.31%, fly ash 1.21%, quartz sand 67.41% (coarse sand: 26.04%; medium sand: 21.92%; fine sand 19.44%), composite early strength agent 0.42% (A Component: lithium carbonate 0.20%, B component: triethanolamine: 0.01% and aluminum sulfate: 0.21%), water reducer 0.07%, rubber powder 0.97%, hybrid fiber 0.07% (basalt fiber 0.06%, polypropylene fiber 0.01%) ), the particle size of coarse sand is 2.36-4.75mm, the particle size of medium sand is 1.18-2.36mm, and the particle size of fine sand is 0.6-1.18mm.

[0062] Its preparation method comprises the following steps:

[0063] S1. According to the above formula of a fast-hardening and early-strength composite repair mortar, weigh each component for later use;

[0064] S20: mechanically milling and activating the fly ash to a particle size of 200 mesh to ob...

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Abstract

The invention belongs to the technical field of a building material, and provides fast hardening early strength type composite repair mortar. The mortar is prepared from the following ingredients in percentage by weight: 5 to 10 percent of water, 20 to 30 percent of cement, 1 to 5 percent of silicon ash, 1 to 5 percent of fly ash, 50 to 70 percent of quartz sand, 0.4 to 0.5 percent of compound early strength agents, 0.06 to 0.1 percent of water reducing agents, 1 to 5 percent of rubber powder and 0.06 to 0.8 percent of hybrid fiber, wherein the composite early strength agent is prepared from an ingredient A and an ingredient B; the ingredient A is lithium carbonate; the ingredient B is a mixture of triethanolamine and aluminum sulfate; the quartz sand consists of coarse sand, medium sand and fine sand; and the hybrid fiber consists of basalt fiber and polypropylene fiber. The fast hardening early strength type composite repair mortar solves the problems of reduced strength, high dry shrinkage rate and low bonding strength of the repair mortar in the prior art.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to a fast-hardening and early-strength composite repair mortar. Background technique [0002] As the main building material, cement concrete has played an irreplaceable role in my country's infrastructure construction, especially in road construction. As one of the two high-grade pavements in my country, cement concrete pavement has been widely used in road construction in my country due to its high rigidity, strong bearing capacity, low cost, and convenient construction. However, with the development of society, the road transportation volume has increased sharply. The cement concrete pavement has been crushed and worn by vehicles for a long time, and the road surface has been damaged to varying degrees, especially the frequent occurrence of heavy and overloaded vehicles, which has accelerated the road damage. speed. Therefore, the repair of existing cement concrete pavem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B14/06C04B2103/12C04B22/10C04B24/122C04B22/147C04B2103/302C04B2103/44C04B14/4643C04B16/0633
Inventor 肖力光张洪磊齐凤梅李根壮林侠
Owner JILIN JIANZHU UNIVERSITY
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