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Nanometer non-shrinkage mortar

A non-shrinkage, nano technology, applied in the field of rapid repair construction and nano non-shrinkage mortar, can solve the problems of affecting structural durability, repairing surface cracking, repairing matrix detachment, etc., to reduce project cost, reduce water-cement ratio, early Strength-enhancing effect

Inactive Publication Date: 2015-10-21
DALIAN KEYKOWN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although both have the characteristics of early strength, there will be different degrees of shrinkage during the setting process, which will not only cause cracking of the repaired surface layer, but also detach from the repaired matrix. The two phenomena will not only affect the appearance quality but also lead to Corrosion of steel bars, affecting the durability of the structure
At the same time, the existing mortar still has the problem of low density, and it is easy to cause corrosion of the internal steel bars in the repaired parts, which further affects the durability of the structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The raw materials and mass percentages used are 40% of cement, 45% of medium sand, 1.0% of high-efficiency water reducing agent, 9% of expansion agent, 2% of nano-scale heavy calcium carbonate, 2% of concrete nano-water reducing super early strength agent and rust inhibitor 1% of the agent; the raw materials and mass percentages of the concrete nano-water-reducing super-early-strength agent are 52% of the early-strength component, 32% of the water-reducing component, 6% of the anti-rust component, and 4% of the retarding component and adjusted Component 6%. Under the condition of satisfying the construction fluidity, the water consumption should be reduced as much as possible.

[0026] Cement: 52.5# Portland cement;

[0027] Medium sand: sand with a fineness modulus of 2.4 and a particle size of 0.35mm;

[0028] Early strength components: magnesium sulfate, sodium sulfate and sodium nitrite;

[0029] Retarding component: sodium gluconate;

[0030] High-efficiency wa...

Embodiment 2

[0035] The raw materials and mass percentages used are 43% of cement, 46% of medium sand, 0.5% of high-efficiency water reducer, 2% of nano-scale heavy calcium carbonate, 5.5% of expansion agent, 1% of concrete nano water-reducing super early strength agent and rust inhibitor 2%; the raw materials and mass percentages of the concrete nano water-reducing super early strength agent are 50% of the early strength component, 30% of the water reducing component, 9% of the antirust component, 4% of the retarding component and the adjustment component 7%. Manufacturing method is the same as embodiment 1.

[0036] Cement: 52.5# Portland cement;

[0037] Medium sand: sand with a fineness modulus of 2.6 and a particle size of 0.4mm;

[0038] The early strength components are triethanolamine, sodium thiosulfate, triisopropanolamine and calcium formate;

[0039] The retarding component is citric acid;

[0040] High-efficiency water reducer: polycarboxylate-based high-efficiency water r...

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Abstract

The invention discloses nanometer non-shrinkage mortar which is quick in early strength, good in cohesiveness with a base body, high in compactness, free of cracking and resistant to corrosion. The nanometer non-shrinkage mortar comprises, by mass, 35%-45% of cement, 45%-55% of medium sand, 0.5%-1.0% of high-efficiency slushing agent, 5-10% of expanding agent, 2%-5% of nanoscale ground calcium carbonate, 1%-2% of concrete nanometer slushing super high-early-strength agent and 1%-2% of rust inhibitor. The concrete nanometer slushing super high-early-strength agent comprises, by mass, 46%-52% of early-strength components, 26%-32% of slushing components, 6%-15% of rust inhibiting components, 4%-5% of retarding components and 6%-8% of nanoscale ground calcium carbonate.

Description

technical field [0001] The invention relates to a cement mortar for emergency repair, in particular to a nano-shrinkage-free mortar with early strength, good adhesion with the substrate, high density, no cracking, and anti-corrosion, which is mainly used for roads, bridges and other concrete projects. Rapid repair construction. Background technique [0002] Cement mortar is made by using cement as cementitious material, sand as aggregate, mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. It can be widely used in civil engineering. Early-strength mortar is characterized by convenient construction and short construction period. It is mainly used for rapid repair construction, rapid concrete repair, and reinforcement projects that require fast construction progress and high durability, such as emergency repair grouting of road bridge joints, high-speed rail bridge support Rapid grouting of the seat, grouting and anchoring of the res...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 贾金青涂兵雄吴锋封硕刘春梅
Owner DALIAN KEYKOWN TECH CO LTD
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