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Efficient retarding and water reducing agent for concrete

A high-efficiency water-reducing agent and concrete technology, applied in the field of building materials, can solve the problems of unsatisfactory early strength effect, etc., and achieve the effect of significant retarding effect, improving workability, and good water-reducing effect.

Inactive Publication Date: 2007-01-03
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molasses retarder with a single component has a good retarding effect, but the early strength effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a kind of retarding superplasticizer for concrete

[0018] This slow-setting high-efficiency water reducer is composed of naphthalenesulfonate formaldehyde condensation product water reducer, sulfamate water reducer, sodium gluconate, sugar calcium and shrinkage reducer. The ratio of various materials is:

[0019] Naphthalene Sulfonate Formaldehyde Condensate Superplasticizer 60%

[0020] Sulfamate superplasticizer 20%

[0021] Sodium Gluconate 4.5%

[0022] Calcium sugar 15.41%

[0023] Cellulose ether 0.09%

[0024] The slow-setting high-efficiency superplasticizer obtained in this example was mixed into concrete for use at a dosage of 1.0%, and its performance is given in Table 1. In this example, due to the composite effect of the sulfamate water reducer and the naphthalene water reducer, the water reducing rate of the concrete is greatly improved, and the setting time is prolonged. It is mainly used to prepare high-strength concrete above C60, and...

Embodiment 2

[0025] Embodiment 2, a kind of retarding superplasticizer for concrete

[0026] This retarding high-efficiency water reducer is composed of naphthalenesulfonic acid condensate water reducer, sodium gluconate, citric acid, sodium tripolyphosphate and shrinkage reducer. The ratio of various materials is:

[0027] Naphthalenesulfonic acid condensation product superplasticizer 86%

[0028] Sodium Gluconate 8%

[0029] Citric Acid 3.4%

[0030] Sodium tripolyphosphate 2.55%

[0031] Cellulose ether 0.05%

[0032] The slow-setting high-efficiency superplasticizer obtained in this example was mixed into concrete for use at a dosage of 1.2%, and its properties are given in Table 1. In this example, due to the compound effect of various retarders, the setting time is delayed longer under the premise that the water-reducing rate of concrete meets the requirements, and the 3D strength of concrete is not affected, and the strength in the later stage is not reduced. It is mainly used t...

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PUM

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Abstract

The present invention relates to one kind of efficient retarding and water reducing agent for concrete suitable for commercial concrete, pumped concrete and bulk concrete. The efficient retarding and water reducing agent consists of water reducing agent 0-90 wt%, retarder I 1-15 wt%, retarder II 0.5-25 wt% and shrinkage reducing agent 0.05-0.2 wt%. The efficient retarding and water reducing agent has simple preparation process, and has the effects of delaying the setting of concrete, raising early strength, reducing water, etc.

Description

1. Technical field [0001] The invention relates to a retarding high-efficiency water reducer for concrete, which is suitable for commercial concrete, pumped concrete and mass concrete, and belongs to the field of building materials. 2. Background technology [0002] In the current large-scale engineering construction, not only modern construction technology and construction methods are required, but also multi-functional performance requirements are put forward for concrete. For example, pumping concrete in high-rise buildings and transporting concrete over long distances requires the concrete to have a large flow state and retardation in order to maintain its good working performance; Temperature stress cracks require concrete to have low heat of hydration, slow heat release, and concrete retardation; and in different projects, according to different needs, concrete is required to have early strength or strength at various ages, etc. All of these concrete The improvement a...

Claims

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Application Information

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IPC IPC(8): C04B24/16C04B24/22C04B24/04C04B24/38C04B103/22
CPCC04B40/0039
Inventor 杭美艳李斌赵根田赵俊梅李梅柳召刚
Owner INNER MONGOLIA UNIV OF SCI & TECH
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