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A preparation method of two-component bagged concrete

A preparation method and concrete technology, applied in the field of construction engineering, can solve the problems of high requirements for concrete, affecting the progress of the project, scattered parts, etc., and achieve the effect of making full use of resources, satisfying rapid installation and flexible preparation

Active Publication Date: 2021-04-02
南京友西科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of concrete poured on site is small and scattered, and the requirements for concrete are high, otherwise it will affect the later project progress
However, it is difficult for commercial concrete to meet the requirements of less dosage, scattered parts, and long construction time. Some construction sites even use on-site mixing methods. Due to the current professional level of the construction team, it is still difficult to ensure that the construction technology of the connecting nodes is completely in line with the quality. Therefore, this is the short board of the new technology of prefabricated buildings, which seriously restricts the construction progress of prefabricated engineering buildings, limits its rapid assembly function, and greatly reduces its superiority

Method used

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  • A preparation method of two-component bagged concrete
  • A preparation method of two-component bagged concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A residential house in a new rural demonstration community adopts a prefabricated monolithic roof. The amount of concrete used for the joints of precast concrete components is less, and the total amount used at one time is only 0.2m 3 , only 10 groups are needed, that is, 10 packs in bag A and 10 packs in bag B. The proportion of concrete is as follows: A component is composed of 70% P II42.5 cement, 4% II grade fly ash, 24% mineral powder, 1.2% sodium sulfate and 0.8% dry powder polycarboxylate superplasticizer, A group After the distribution system, it is divided into 8Kg / bag; component B is composed of 38% artificial sand (water content 5%) and 62% 5-20mm gravel (moisture content 0.8%), that is, each bag uses 15.96Kg artificial It is made of wet sand and 25Kg of crushed stone, so that the weight of bag B is 40.96Kg (water content), and the two bags of A and B in each group are unpacked and mixed well, and 1.85Kg of water is added, and the slump of the mixed concrete...

Embodiment 2

[0028] A self-built house of a rural resident is a brick-concrete bungalow with a sloping roof. Bottom beams, wall columns, ring beams, etc. are all cast-in-place. Due to the small amount of single-cast concrete, the purchase of commercial concrete and the difficulty of self-mixing concrete, it is decided to use bagged C30 concrete. The proportion of A bag is as follows: 68% P·II42.5 cement, 6.8% Class II fly ash, 24% mineral powder, 1.2% naphthalene powder water reducer, after preparation, repackage, A weight is 7.5Kg / bag; B component is composed of water 4.5% medium sand (equivalent to 36% dry sand) and 5-20mm (equivalent to solid content 64%) crushed stones with a moisture content of 0.5%. Each bag is composed of 15.24Kg wet sand and 26.05Kg wet stone. 41.29Kg, A / B is 1 / 5.4, manual mixing after unpacking, adding 1.84Kg of water to each group, the slump is 7cm, after testing, the concrete strength at 7d is 25MPa, and the compressive strength at 28d is 34MPa.

[0029] When b...

Embodiment 3

[0031]A school education building is assembled with prefabricated components. In order to catch up with the progress, the compressive strength of the joint concrete is required to be no less than 25MPa in 24 hours. The component A is composed of 70% P II52.5 cement, 22.5% mineral powder, and 3% I grade Fly ash, 2% silicon powder, 1.3% sodium sulfate, 0.2% sodium silicate powder, 1% dry powder polycarboxylate superplasticizer, after preparation, it will be repackaged, each bag weighs 8Kg, and component B consists of 36% Artificial sand and 64% 5 ~ 20mm crushed stone components, because both aggregates contain water, the artificial sand contains 4% water, and the crushed stone contains 0.7% water, that is, each bag is prepared with 14.98Kg artificial wet sand and 25.78Kg crushed stone Formed, the B bag weighs 40.76Kg after containing water. When mixing each group of materials, 2.1Kg of water is added. After testing, the 24h compressive strength is 30MPa, which meets the engineer...

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Abstract

The invention discloses a preparation method of bi-component bag concrete. The bag concrete comprises two parts, wherein the A component comprises cement, a mineral admixture, a dry powder water reducer and other modified solid powder; and the B component comprises artificial wet sand or wet river sand or mixed sand of the artificial wet sand and the wet river sand and a pebble wet material. The Acomponent and the B component are packaged by small packaging bags. In a using process, the A component and the B component are poured out, an appropriate amount of water is added, and uniform mixingis performed for use. Various concrete with different characteristics and special requirements can be obtained by changing a mixing ratio of the A component and the B component and an A / B ratio. Thepreparation method is suitable for the concrete with low single dosage or the special requirements.

Description

technical field [0001] The invention belongs to the field of construction engineering, and relates to a method for preparing two-component bagged concrete with a small single-use amount or special requirements. Background technique [0002] With the widespread popularization and application of commercial concrete and prefabricated concrete structures, some concrete with special requirements, especially the use of small batches of concrete, has encountered great difficulties. Due to the small batches, concrete mixing plants are difficult to meet their requirements and are unwilling to supply them. Users The quality of self-mixing is also difficult to guarantee, and some concrete users with special requirements cannot prepare it by themselves, and it is difficult to purchase due to the small amount of raw materials, which seriously affects the popularization and application of some new construction technologies. [0003] The Premier of the State Council presided over the execu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B2201/50C04B18/08C04B18/12C04B22/147C04B2103/302C04B14/06C04B14/02C04B12/04
Inventor 缪海燕王晓芳鹿立云盛思仲叶铭勋
Owner 南京友西科技集团股份有限公司
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