Multifunctional box culvert pipe gallery concrete and preparation method thereof

A multi-functional, concrete technology, applied in the field of concrete, can solve the problems of unsatisfactory fluidity and self-compacting properties of concrete, hollow, honeycomb and pockmarked surface, large economic burden, etc., to prolong the secondary hydration time and reduce cracking. , the effect of delaying the hydration process

Inactive Publication Date: 2021-01-08
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, Chinese patent CN110668750A discloses a special high anti-seepage compensation shrinkage concrete for urban underground comprehensive pipe gallery and its preparation method, which utilizes the synergistic effect of ore, microbeads, fly ash, and nano-mineral powder to reduce cement hydration Heat and inhibit the generation of cracks when the cement volume changes due to physical and chemical reactions, in order to improve the compactness, anti-seepage and erosion capabilities of the concrete, but the concrete in this patent cannot satisfy the fluidity and self-compacting properties on the one hand, and it is easy to cause voids. The production of drums, honeycomb and pitted surface, on the other hand, in order to suppress the hydration reaction in the early stage, it will cause a large economic burden for the middle and late maintenance. At the same time, the cost of using nano-mineral powder and cement-based permeable crystallization materials as raw materials is also relatively expensive, so it is not suitable for use. In the construction of large-volume and large-scale pipe gallery projects

Method used

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  • Multifunctional box culvert pipe gallery concrete and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for multifunctional box culvert pipe gallery concrete, comprising the steps of:

[0027] 1. In parts by weight, 25 parts of cement, 8 parts of microbeads, 12 parts of fly ash, 15 parts of natural zeolite and 2.3 parts of composite fiber (PVA: carbon fiber = 5: 5), etc. are discharged to the hopper through the raw material bin Transported in the car to the stirring tank for mixing and stirring for 45s;

[0028] 2. Unload 8 parts of sand material and 9 parts of aggregate into the mixing bin according to the weight and mix them for later use;

[0029] 3. Take by weight 9 parts of polycarboxylic acid mother liquor, 8 parts of polycarboxylate mother liquor, 3 parts of sodium citrate, 0.5 part of plastic powder, 0.02 part of alkylsulfonate air-entraining agent and 0.03 part of polyether disinfectant Stir 80 parts of foaming agent and mixing water evenly to obtain the water reducing agent component for later use;

[0030] 4. Open the resin tank, extract ...

Embodiment 2

[0033] A multifunctional box culvert pipe gallery concrete and a preparation method thereof, comprising the following steps:

[0034] 1. In parts by weight, discharge 22 parts of cement, 6 parts of microbeads, 13 parts of fly ash, 20 parts of natural zeolite and 2 parts of composite fiber (PVA:PP=8:2) into the hopper through the raw material bin Transported in the car to the stirring tank for mixing and stirring for 30s;

[0035] 2. Unload 10 parts of sand and 11 parts of aggregate in parts by weight into the mixing bin and mix for later use;

[0036] 3. Take by weight 12 parts of polycarboxylic acid mother liquor, 7 parts of polycarboxylate mother liquor, 2 parts of sodium citrate, 1 part of plastic powder, 0.01 part of alkylsulfonate air-entraining agent and 0.02 part of polyether disinfectant 78 parts of foaming agent and mixing water were stirred evenly, and the water reducing agent component was obtained for later use;

[0037]4. Open the resin tank, take 6 parts of wat...

Embodiment 3

[0040] A multifunctional box culvert pipe gallery concrete and a preparation method thereof, comprising the following steps:

[0041] 1. In terms of parts by weight, discharge 25 parts of cement, 5 parts of microbeads, 15 parts of fly ash, 12 parts of natural zeolite and 2 parts of composite fiber (PVA:PP=8:2) into the hopper through the raw material bin Transported in the car to the stirring tank for mixing and stirring for 30s;

[0042] 2. Discharge 9 parts of sand material and 14 parts of aggregate into the mixing bin according to the weight and mix them for later use;

[0043] 3. Take by weight 10 parts of polycarboxylic acid mother liquor, 8 parts of polycarboxylate mother liquor, 2 parts of sodium citrate, 1 part of plastic-preserving powder, 0.02 part of alkylsulfonate air-entraining agent and 0.03 part of polyether disinfectant 79 parts of foaming agent and mixing water were stirred evenly, and the water reducing agent component was obtained for later use;

[0044] 4...

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Abstract

The invention discloses a multifunctional box culvert pipe gallery concrete and a preparation method thereof. The multifunctional box culvert pipe gallery concrete is prepared from, by weight, 20-25 parts of cement, 8-12 parts of sand, 9-18 parts of aggregate, 5-8 parts of microbeads, 8-15 parts of fly ash, 12-18 parts of zeolite, 4-6 parts of waterborne resin, 0.6-1.5 parts of an expanding agent,1-3 parts of composite fiber, 0.7-2 parts of a water reducing agent component and 12-20 parts of total water. The self-compacting and working performance of concrete can be obviously improved, meanwhile, the self-curing performance is achieved, and vertical cracking of a large-size, ultra-long and thin-wall concrete gallery body structure can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of concrete, and in particular relates to a multifunctional box culvert pipe gallery concrete and a preparation method thereof. Background technique [0002] The underground comprehensive pipe gallery is one of the important symbols of the modernization of the contemporary new urban municipal infrastructure construction, and it has the requirement of a long service life. At this stage, since the main structure of the pipe gallery is constructed by integral pouring of concrete, the quality of the concrete used determines the overall performance and service life of the pipe gallery. Therefore, the construction of high-performance pipe gallery requires concrete to meet the compressive requirements. Changes in conditions, combined with the requirements of different structural objects, meet the performance requirements of self-compacting, self-curing, low heat of hydration, low shrinkage, high plastic retention and high du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B14/06C04B14/02C04B14/24C04B14/386C04B16/0641C04B18/08C04B24/06C04B24/16C04B24/32C04B2103/308C04B2103/30C04B24/2641C04B22/14C04B2103/302C04B16/0633
Inventor 陈世伟张剑锋周紫晨马新国曾明赵亮
Owner CHINA FIRST METALLURGICAL GROUP
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