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Self-compacting vibration-free concrete and its preparation method

A vibration-free, concrete technology, applied in the field of construction, can solve the problems of inconvenient vibration and compaction, and achieve the effects of complete edges and corners, improved guarantee rate, and uniform distribution.

Active Publication Date: 2017-07-28
山东隆和节能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prefabricated laminated panels are produced under the long-line table, and the bottom plate is ultra-thin, which is inconvenient for vibration compaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] A self-compacting vibration-free concrete, comprising the following components by weight: 422 parts of cement, 725 parts of gravel, 815 parts of sand, 210 parts of water, 129 parts of fly ash, 35 parts of gypsum, 1.8 parts of paraffin, polyvinyl alcohol 1.2 parts, 0.3 parts of polypropylene short fiber, 0.4 parts of polycarboxylate superplasticizer, 0.1 part of SM water reducing agent, 0.2 parts of SAP water retaining agent, 0.2 parts of redispersible rubber powder, 0.05 parts of EEA plastic expansion agent, glucose Sodium acid powder 0.004 part, gelatin 0.02 part.

[0017] In this example, the water-binder ratio is 0.38, the sand ratio is 0.529, the slump is 269mm, the time required for the diameter to slump to 500mm is 6s, there is no segregation and bleeding, and the 28d cubic compressive strength measured by the test is 49MPa .

example 2

[0019] A self-compacting vibration-free concrete, comprising the following components by weight: 375 parts of cement, 877.5 parts of gravel, 804.5 parts of sand, 182 parts of water, 90 parts of fly ash, 45 parts of gypsum, 2.5 parts of vitrified microbeads, 2.8 parts of paraffin wax, 2 parts of polyvinyl alcohol, 0.5 parts of polypropylene short fiber, 0.2 parts of polycarboxylate superplasticizer, 0.3 parts of SM water reducing agent, 0.25 parts of SAP water retaining agent, 0.05 parts of redispersible rubber powder, sodium carbonate 0.1 part, EEA plastic expansion agent 0.02 part, sodium gluconate powder 0.02 part, gelatin 0.1 part.

[0020] In this example, the water-binder ratio is 0.39, the sand rate is 0.478, the slump is 253mm, and the time required for the diameter to slump to 500mm is 11.4s, without segregation and bleeding, and the 28d cubic compressive strength measured by the test is 49.5MPa.

Embodiment 3

[0022] A self-compacting vibration-free concrete, comprising the following components by weight: 480 parts of cement, 1100 parts of gravel, 720 parts of sand, 175 parts of water, 160 parts of fly ash, 40 parts of gypsum, 5 parts of vitrified microbeads, 2.5 parts of paraffin wax, 3.2 parts of polyvinyl alcohol, 0.45 parts of polypropylene short fiber, 0.2 parts of polycarboxylate superplasticizer, 0.2 part of SM water reducer, 0.3 part of SAP water retaining agent, 0.3 part of redispersible rubber powder, carbonic acid 0.05 parts of sodium, 0.05 parts of EEA plastic expansion agent, 0.015 parts of sodium gluconate powder, and 0.08 parts of gelatin.

[0023] In each of the above embodiments, the cement is ordinary Portland cement; the stones are continuously graded crushed stones with a particle size of 5-15mm, and the mud content is less than 0.5%; the sand includes coarse sand and fine sand, and coarse sand and fine sand The volume ratio is 4.5-6.5:3.5-5.5, of which the parti...

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Abstract

The invention provides self-compacting non-vibration concrete and a preparation method. The self-compacting non-vibration concrete comprises the following components in parts by weight: cement, stones, sand, water, fly ash, gypsum, vitrified microspheres, paraffin, polyvinyl alcohol, a polypropylene staple fiber, a polycarboxylate-type efficient water-reducing agent, an SM water-reducing agent, an SAP water-retaining agent, redispersable rubber powder, sodium carbonate, an EEA plasticity expansive agent, sodium gluconate powder and gelatin. The preparation method comprises the following steps: in a primary material feeding process, adding part of the stones into a material hopper, adding part of the cement and sand, and then adding part of the fly ash and remaining components except water; in a secondary material feeding process, adding the rest of the stones and sand as well as 70% of water for 10-20 seconds' stirring, adding the rest of the cement, fly ash and remaining components except water for 30 seconds' stirring, and finally adding the rest of water, namely 30% of water, for 60 seconds' stirring.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a self-compacting vibration-free concrete and a preparation method thereof. The concrete can be widely used in the field of prefabricated buildings under the industrialization of housing, and is suitable for the production and use of prefabricated laminated panels. Background technique [0002] Self-compacting concrete is a concrete that does not require additional vibration during the compaction process. Relying on its good fluidity, it can achieve a uniform self-compacting effect only under the action of its own weight. This kind of concrete does not segregate, does not soak in water, and does not foam when it is in a fluid state; the initial setting time is long, the final setting time is short, and the early strength is high; after hardening, it has good stability, no shrinkage cracks, and the surface is flat and durable. Good abrasiveness. [0003] Housing industrializa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 王振隆郭庆亮王妙男张士兵常青山孙华强谢玉昌耿磊
Owner 山东隆和节能科技股份有限公司