Self-compacting mortar and preparation method thereof

A self-compacting, mortar technology, applied in the field of building materials, can solve the problem of high tailings volume, and achieve the effect of improving performance, good economic benefits, and suppressing water absorption performance

Pending Publication Date: 2021-04-13
CHINA MINGSHENG DRAWIN TECH INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main utilization method of molybdenum tailings is to recover valuable metals such as tungsten, molybdenum, copper, iron, titanium, etc. from molybdenum tailings. Utilization of tailings

Method used

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  • Self-compacting mortar and preparation method thereof
  • Self-compacting mortar and preparation method thereof
  • Self-compacting mortar and preparation method thereof

Examples

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Effect test

preparation example Construction

[0058] The present invention also provides a method for preparing the self-compacting mortar described in the above technical solution, comprising the following steps:

[0059] Portland cement, sulphoaluminate cement, fly ash, molybdenum tailings powder, limestone powder, expansion agent, molybdenum tailings ceramsite, fiber, water reducer and water are mixed to obtain self-compacting mortar.

[0060] In the preparation method provided by the present invention, Portland cement, sulphoaluminate cement, fly ash, molybdenum tailings powder, limestone powder, expansion agent, molybdenum tailings ceramsite, fiber, water reducer and water Mix uniformly in proportion to obtain the self-compacting mortar provided by the present invention; the specific mixing process preferably includes: first mix Portland cement, sulphoaluminate cement, fly ash, molybdenum tailings powder, limestone powder, expansion agent , molybdenum tailings ceramsite, water reducing agent and water are mixed, and ...

Embodiment 1

[0118] Preparation of molybdenum tailings ceramsite:

[0119] 1) Raw material composition:

[0120] Element Dosage Molybdenum tailings powder 50 parts by weight Ceramic polishing waste powder 8 parts by weight fly ash 15 parts by weight limestone powder 10 parts by weight Portland cement 10 parts by weight plaster 3 parts by weight base activator 4 parts by weight water 15 parts by weight grinding aid 500g / t of the total mass of gypsum and alkali activator

[0121] 2) Preparation of molybdenum tailings ceramsite:

[0122] First, in the presence of grinding aids, mix and grind the alkali activator and gypsum to less than 0.075mm to obtain a prefabricated material; then mix the prefabricated material with ceramic polishing waste powder, molybdenum tailings powder, cement, stone powder, fly ash and Mix the water evenly to obtain a mixture; then put the mixture into a ball-forming tray to form pellets t...

Embodiment 2

[0126] Modification of molybdenum tailings ceramsite:

[0127] 1) Raw material composition:

[0128]

[0129]

[0130] 2) Preparation of modified molybdenum tailings ceramsite:

[0131] Mix molybdenum tailings ceramsite prepared in Example 1 with cement, polysiloxane, starch ether, cellulose, rubber powder, water reducer, air-entraining agent and defoamer to obtain modified molybdenum tailings ceramsite .

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Abstract

The invention belongs to the field of building materials, and particularly relates to self-compacting mortar and a preparation method thereof. The self-compacting mortar provided by the invention comprises the following components in parts by weight: 120-300 parts of Portland cement; 20-120 parts of sulphoaluminate cement; 50-90 parts of fly ash; 100-300 parts of molybdenum tailing powder; 20-80 parts of limestone powder; 5-30 parts of an expanding agent; 200-400 parts of molybdenum tailing ceramsite; 1-10 parts of fibers; 1-5 parts of a water reducing agent; and 100-200 parts of water. According to the mortar provided by the invention, the molybdenum tailing powder and the molybdenum tailing ceramsite are used as production raw materials, so that resource utilization of molybdenum tailings is realized; the construction time of the mortar can be adjusted within 20min-1h, the initial setting time is 2-4h, the 28d strength reaches C30-C50, and the volume weight is within 2000kg/m < 3 >; in addition, the mortar does not need to be vibrated manually in the whole casting process, and construction is convenient.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a self-compacting mortar and a preparation method thereof. Background technique [0002] In building construction, in order to prevent harmful cracks that may occur in cast-in-place reinforced concrete structures due to uneven temperature and shrinkage, temporary construction joints are reserved at the corresponding positions of slabs (including foundation slabs), walls, and beams in accordance with design or construction specifications. The structure is temporarily divided into several parts, and after a certain period of time, the construction joint concrete is poured after the internal shrinkage of the components to connect the structure into a whole. This method of pouring concrete in the temporary construction joints left to realize the connection is called cast-in-place belt connection. The cast-in-place belt connection is an effective measure that can not only solve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/02C04B18/12
CPCC04B28/06C04B18/021C04B18/12C04B2201/50C04B2201/20C04B7/02C04B18/08C04B14/28C04B2103/0068C04B2103/302C04B22/002C04B16/0633C04B7/00C04B22/143C04B22/147C04B22/064C04B12/04Y02W30/91
Inventor 康志坚李火星周鹏
Owner CHINA MINGSHENG DRAWIN TECH INVESTMENT CO LTD
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