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Pre-coagulating weighting agent for special concrete

A concrete and special technology, applied in the field of special concrete early setting weighting agent, can solve the problems affecting the use of special concrete, long concrete setting time, poor concrete compactness, etc., to achieve increased compactness, increased bulk density, and increased workability Effect

Active Publication Date: 2013-08-14
天津昶达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Special concrete is widely used in construction engineering, but there are such problems in the use of special concrete: the setting time of concrete is long, the bulk density of concrete is small, and the compactness of concrete is poor, which affects the use of special concrete

Method used

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  • Pre-coagulating weighting agent for special concrete
  • Pre-coagulating weighting agent for special concrete

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Water reducer 20% (weight ratio), calcium nitrite 13% (weight ratio), calcium formate 8% (weight ratio), sodium thiocyanate 2.5% (weight ratio), sodium fluorosilicate 1.6% (weight ratio ), 0.7% (weight ratio) of sodium aluminate, 0.2% (weight ratio) of hydroxyethyl cellulose, 0.3% (weight ratio) of sodium alkylsulfonate, and 53.7% (weight ratio) of fly ash. Spiral cone mixer, stirring for 30 minutes, tested the obtained special concrete early setting weighting agent, the test results are as shown in Table 1.

[0035] Table 1

[0036]

Embodiment 2

[0038] Water reducer 30% (weight ratio), calcium nitrite 10% (weight ratio), calcium formate 6% (weight ratio), sodium thiocyanate 2% (weight ratio), sodium fluorosilicate 1.2% (weight ratio ), 0.5% (by weight) of sodium aluminate, 0.2% (by weight) of hydroxyethyl cellulose, 0.1% (by weight) of sodium alkyl sulfonate, 50% (by weight) of fly ash, and put into the cantilever double Spiral cone mixer, stirring for 30 minutes, tested the obtained special concrete early setting weighting agent, the test results are as shown in Table 2.

[0039] Table 2

[0040]

Embodiment 3

[0042] Water reducer 40% (weight ratio), calcium nitrite 7% (weight ratio), calcium formate 4% (weight ratio), sodium thiocyanate 1.5% (weight ratio), sodium fluorosilicate 0.8% (weight ratio ), sodium aluminate 0.3% (weight ratio), hydroxyethyl cellulose 0.1% (weight ratio), sodium alkyl sulfonate 0.1% (weight ratio), water 46.2% (weight ratio), and then put into the cantilever double helix cone Shaped mixer, stirring for 30 minutes, the obtained special concrete early setting weighting agent is tested, and the test results are as shown in Table 3.

[0043] table 3

[0044]

[0045] As can be seen from the technical solutions provided by the present invention above, the present invention has the following technical effects:

[0046] (1) Under the condition of special concrete and mortar with very little cement slurry, it can play the role of early setting, early strength, viscosity increase, weight increase, compactness and antifreeze.

[0047] (2) The special early-settin...

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PUM

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Abstract

The invention discloses a pre-coagulating weighting agent for special concrete. The pre-coagulating weighting agent for special concrete comprises the following components in percentage by weight: 20-40% of water reducer, 7-13% of calcium nitrite, 4-8% of calcium formate, 1.5-2.5% of sodium thiocyanate, 0.8-1.6% of sodium fluosilicate, 0.3-0.5% of sodium aluminate, 0.1-0.2% of hydroxyethyl cellulose, 0.1-0.3% of alkyl sodium sulfonate and 40-60% of additive. The pre-coagulating weighting agent for special concrete can realize the effects of pre-coagulating, early strengthening, tackifying, weighting, increasing density and antifreezing.

Description

technical field [0001] The invention relates to an early setting weighting agent, in particular to a special early setting weighting agent for concrete. Background technique [0002] Special concrete is widely used in construction engineering, but there are such problems in the use of special concrete: the setting time of concrete is long, the bulk density of concrete is small, and the compactness of concrete is poor, which affects the use of special concrete. Contents of the invention [0003] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a special concrete early setting weighting agent. [0004] For this reason, the present invention provides a kind of special concrete early setting weighting agent, described concrete early setting weighting agent comprises: water reducer 20%-40% (weight ratio), calcium nitrite 7%-13% (weight ratio) ratio), calcium formate 4%-8% (weight ratio), sodium thiocyanate 1.5%-...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/12
Inventor 贺秀云
Owner 天津昶达科技有限公司