CN102992696B

CN102992696B - Water reducing agent for shrinkage-compensating concrete

Info

Publication number: CN102992696B
Application number: CN201210549971.2A
Authority: CN
Inventors: 王凤丽; 王国强
Original assignee: SUZHOU CHENGHU CONCRETE CO Ltd
Current assignee: SUZHOU CHENGHU CONCRETE CO Ltd
Priority date: 2012-12-18
Filing date: 2012-12-18
Publication date: 2015-06-24
Anticipated expiration: 2032-12-18
Also published as: CN102992696A

Abstract

The invention discloses a water reducing agent for shrinkage-compensating concrete. The water reducing agent comprises the following components in percentage by weight: 70%-80% of naphthalene or homologue, 5%-7% of aliphatic compound, 1%-6% of sodium gluconate, 1%-3% of lauryl sodium sulfate, 0.1%-0.5% of cellulose formaldehyde, 0.1%-0.5% of hydroxypropyl methyl cellulose and the balance of water. The water reducing agent disclosed by the invention has no waste and dust, has no damage to a human body, has no pollution to the environment, and belongs to a green product in the construction industry; simultaneously, the early cracking can be reduced, and harmful cracks of the concrete can be reduced into harmless cracks.

Description

A kind of the reinforcement of concrete water reducer of compensate for shrinkage

Technical field

The present invention relates to one can make pump concrete reduce early-age crack in construction application, and concrete harmful cracks can be made to reduce the reinforcement of concrete water reducer becoming the compensate for shrinkage in harmless crack.

Background technology

Concrete cracking is a common phenomenon in concrete application, is also often by the large problem perplexed in building operation.Reduce or suppress the technical measures of concrete cracking to have a lot, the water reducer of admixture compensate for shrinkage in concrete, to reduce concrete contraction, is exactly one wherein.Concrete shrinkage easily causes concrete cracking, and when concrete string stress is greater than concrete tensile strength, concrete will ftracture.

Conventional is naphthalene water reducer in the market, and its large advantage of doing is that water-reducing rate is large, and reinforced effects is good, but due to the restriction by its mechanism of action, some existing problems bring constant also to engineering applying unit.Such as: concrete shrinking percentage increases, and easily ftractures, or the shortcoming such as slump-loss is fast.

Summary of the invention

For the technical problem of above-mentioned existence, the object of the invention is: propose one and pump concrete can be made in construction application to reduce early-age crack, and concrete harmful cracks can be made to reduce the reinforcement of concrete water reducer becoming the compensate for shrinkage in harmless crack.

Technical solution of the present invention is achieved in that a kind of the reinforcement of concrete water reducer of compensate for shrinkage, comprises naphthalene or homologue, fatty compounds, Sunmorl N 60S, sodium lauryl sulphate, formaldehyde fibers element, HPMC; Wherein naphthalene or homologue to account for heavy per-cent be 70%-80%; Fatty compounds to account for heavy per-cent be 5%-7%; Sunmorl N 60S to account for heavy per-cent be 1%-6%; Sodium lauryl sulphate to account for heavy per-cent be 1%-3%; Formaldehyde fibers element to account for heavy per-cent be 0.1-0.5%; HPMC to account for heavy per-cent be 0.1%-0.5%, all the other are water.

Due to the utilization of technique scheme, the present invention compared with prior art has following advantages:

The reinforcement of concrete water reducer of compensate for shrinkage of the present invention, without waste, without airborne dust, to human body without harm, environmentally safe, belongs to the green product in construction industry; Simultaneously, the reinforcement of concrete water reducer of compensate for shrinkage of the present invention belongs to liquid, meet pumping agent regulation in GB8076-2008 concrete admixture standard, directly added in mixed material by transport pipe again by after proportioning accurate measurement by gauger in concrete production process, convenient and swift; And the paste flowing degree of this programme is greater than 120mm, water-reducing rate is high, and slump retaining is good, can reduce early-age crack, and the minimizing of concrete harmful cracks can be made to become harmless crack.

Embodiment

Embodiment one:

The reinforcement of concrete water reducer of a kind of compensate for shrinkage of the present invention, comprises naphthalene or homologue, fatty compounds, Sunmorl N 60S, sodium lauryl sulphate, formaldehyde fibers element, HPMC; Wherein the heavy per-cent that accounts for of naphthalene or homologue is 70%; The heavy per-cent that accounts for of fatty compounds is 5%; The heavy per-cent that accounts for of Sunmorl N 60S is 3%; The heavy per-cent that accounts for of sodium lauryl sulphate is 1%; The heavy per-cent that accounts for of formaldehyde fibers element is 0.2%; The heavy per-cent that accounts for of HPMC is 0.3%, and all the other are water.

Embodiment two:

The reinforcement of concrete water reducer of a kind of compensate for shrinkage of the present invention, comprises naphthalene or homologue, fatty compounds, Sunmorl N 60S, sodium lauryl sulphate, formaldehyde fibers element, HPMC; Wherein the heavy per-cent that accounts for of naphthalene or homologue is 80%; The heavy per-cent that accounts for of fatty compounds is 7%; The heavy per-cent that accounts for of Sunmorl N 60S is 3%; The heavy per-cent that accounts for of sodium lauryl sulphate is 3%; The heavy per-cent that accounts for of formaldehyde fibers element is 0.5%; The heavy per-cent that accounts for of HPMC is 0.5%, and all the other are water.

Above-described embodiment and being applied to separately in concrete, their technical feature sees the following form:

Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences done according to spirit of the present invention change or modify, and all should be encompassed in protection scope of the present invention.

Claims

1. a reinforcement of concrete water reducer for compensate for shrinkage, is characterized in that: comprise naphthalene or homologue, fatty compounds, Sunmorl N 60S, sodium lauryl sulphate, formaldehyde fibers element, HPMC; Wherein naphthalene or homologue to account for heavy per-cent be 70%-80%; Fatty compounds to account for heavy per-cent be 5%-7%; Sunmorl N 60S to account for heavy per-cent be 1%-6%; Sodium lauryl sulphate to account for heavy per-cent be 1%-3%; Formaldehyde fibers element to account for heavy per-cent be 0.1-0.5%; HPMC to account for heavy per-cent be 0.1%-0.5%, all the other are water.