Polymer cement mortar for quick repair of concrete and preparation method thereof

A cement mortar and polymer technology, applied in the field of cement, can solve the problems of low early bonding strength, long setting time, low flexural strength, etc. Effect

Inactive Publication Date: 2016-12-14
ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymer mortar has problems such as long setting time, low early bonding strength, and low early flexural strength, such as a kind of fiber-reinforced high-strength mortar for concrete structure repair disclosed by the authorization announcement number CN101580369 B

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Take the components according to the mass fraction ratio: cement 20%; quartz sand 54%; limestone powder 10%; ethylene-vinyl acetate copolymer emulsion 6%; 0.04% foaming agent; 0.5% powder water reducer; 0.6% iron powder; 0.03% lithium carbonate; 0.09% polypropylene fiber; the rest is water, the sum of the above components is 100%.

[0033] 2) Stir and mix water, ethylene-vinyl acetate copolymer emulsion and silicone polyether defoamer with a non-volatile content of 24-26% in advance according to the proportion.

[0034] 3) Put cement, quartz sand, limestone powder, iron powder, melamine superplasticizer, lithium carbonate, polypropylene fiber and the mixture obtained in step 2) into the mixer and mix for 4 minutes to obtain the polymer for rapid repair of concrete cement mortar.

[0035] The polymer cement mortar obtained by the above method is tested with reference to JC / T336-2011, and the 1-day compressive strength, flexural strength and bonding strength are 14.6,...

Embodiment 2

[0037] 1) Take the components according to the mass fraction ratio: 20% cement; 52% quartz sand; 10% limestone powder; 9% neoprene emulsion; silicone polyether defoamer with a non-volatile content of 24-26% 0.04%; melamine superplasticizer 0.5%; iron powder 0.6%; lithium carbonate 0.03%; polypropylene fiber 0.09%; the rest is water, the sum of the above components is 100%.

[0038] 2) Stir and mix water, neoprene emulsion and silicone polyether defoamer with a non-volatile content of 24-26% in advance according to the proportion.

[0039] 3) Put cement, quartz sand, limestone powder, melamine superplasticizer, iron powder, lithium carbonate, polypropylene fiber and the mixture obtained in step 2) into the mixer and mix for 4 minutes to obtain the polymer for rapid repair of concrete cement mortar.

[0040] The polymer cement mortar obtained by the above method is tested with reference to JC / T336-2011, and the 1-day compressive strength, flexural strength and bonding strength ...

Embodiment 3

[0042] 1) Take the components according to the mass fraction ratio: 25% cement; 40% quartz sand; 10% limestone powder; 6% neoprene emulsion; silicone polyether defoamer with a non-volatile content of 24-26% 0.03%; naphthalene-based water reducer 1%; iron powder 0.9%; sodium carbonate 0.12%; polypropylene fiber 0.05%; the rest is water, the sum of the above components is 100%.

[0043] 2) Stir and mix water, neoprene emulsion and silicone polyether defoamer with a non-volatile content of 24-26% in advance according to the proportion.

[0044] 3) Put cement, quartz sand, limestone powder, naphthalene-based water reducer, iron powder, sodium carbonate, polypropylene fiber and the mixture obtained in step 2) into the mixer and mix for 4 minutes to obtain a polymer for quick repair of concrete. material cement mortar.

[0045] The polymer cement mortar obtained by the above method is tested with reference to JC / T336-2011. The 1-day compressive strength, flexural strength and bondi...

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Abstract

The invention discloses a polymer cement mortar for quick repair of concrete and a preparation method thereof, and the polymer cement mortar comprises the following components: 15-25% of cement; 40-60% of quartz sand; 5-10% of limestone powder; 6-12% of polymer emulsion; 0.03-0.06% of a defoaming agent; 0.5-1% of a powder water reducing agent; 0.6-0.9% of iron powder; 0.03-0.12% of a coagulation accelerator; 0.05-0.15% of polypropylene fiber; and balance of water. The method can significantly improve the hydration rate of the polymer cement mortar for quick repair of concrete, reduces the shrinkage rate of the polymer cement mortar for quick repair of concrete, also can improve the bonding strength of the polymer cement mortar for quick repair of concrete with old concrete, the mechanical and construction performance and durability in cold environment of the polymer cement mortar for quick repair of concrete can be improved, and the polymer cement mortar for quick repair of concrete is particularly suitable for quick repair of high speed railway reinforced concrete structures.

Description

technical field [0001] The invention belongs to the technical field of cement, and relates to a polymer cement mortar for rapid concrete repair and a preparation method thereof, in particular to a polymer cement mortar for rapid concrete repair with early strength and suitable for short construction time. Background technique [0002] Polymer cement mortar is a mixture of cement, aggregate and organic polymers that can be dispersed in water. A polymer can be a homopolymer polymerized from one monomer, or a copolymer polymerized from two or more monomers. The polymer must form a film over the cement particles under ambient conditions and form a strong bond between the cement body and the aggregate. The polymer network must have the ability to prevent the occurrence of microcracks and also prevent the propagation of cracks. [0003] As a widely used cement-based repair material, polymer cement mortar has the characteristics of good water retention, strong adhesion to the ori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/72
CPCC04B28/065C04B2111/72C04B14/06C04B14/28C04B14/34C04B16/0633C04B24/26C04B2103/50C04B2103/302C04B2103/12C04B24/2682
Inventor 黄海彭建伟刘洋汪志勇陈娟
Owner ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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