Improved machine-sprayable/pumpable mortar

An improved pumping technology, which is applied in the field of ready-mixed dry powder mortar, can solve problems affecting project progress, labor shortage, and high labor intensity, and achieve the goal of enhancing adhesion stability, reducing cracking and hollowing, and improving construction efficiency. Effect

Inactive Publication Date: 2017-06-13
NANJING NEW BUILDING MATERIALS DAY CLOUD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Dry-mixed mortar, also known as dry-mixed mortar, dry-mixed mortar or premixed (dry) mortar, refers to fine aggregates and inorganic binders, water-retaining thickening materials, A granular or powdery mixture of ingredients and additives mixed according to a certain ratio; in building construction, there are disadvantages in purely hand-painted construction, such as high labor intensity, long working hours, and labor shortage, resulting in low production efficiency. Thus affecting the progress of some construction nodes in the project construction; at the same time, due to the constraints of on-site production conditions, it cannot meet the requirements of the product for different raw materials, which affects the performance of the mortar; for example, after the main body of the project is capped, a large number of wall masonry and plastering stages , due to the scarcity of professional bricklayers, it directly affected the progress of the project, and also brought common problems in the construction industry, including wall cracking, water seepage, and plastering layer hollowing and falling off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Formula: 150kg of cement, 50kg of fly ash, 770kg of fine aggregate, 30kg of water-retaining and thickening material, 9kg of redispersible latex powder, 2kg of stabilizer, 8kg of machine spray pumping additive, and 3kg of PP fiber;

[0021] The cement is ordinary Portland cement P·O 42.5; the fly ash is grade II. The water-retaining thickening material is a mixture of bentonite, primary fly ash, hydroxypropyl methylcellulose ether, and latex powder, and the weight ratio range of the four is 4.6:5.5:0.13:0.07. The stabilizer is carbon black 220. The machine spray pumping additive is a mixture of sodium lauryl sulfate, bauxite, naphthalene-based water reducer or polycarboxylate admixture, and the weight ratio range of the three is 0.5:8.2:1.3;

[0022] Preparation steps: first mix fine aggregate, cement, water-retaining thickening material, and fly ash, and at the same time add redispersible latex powder, stabilizer, machine spray pumping additive, and pp fiber to mix eve...

Embodiment 2

[0028] Formula: 200kg of cement, 30kg of fly ash, 740kg of fine aggregate, 25kg of water-retaining thickening material, 7kg of redispersible latex powder, 3kg of stabilizer, 9kg of machine spray pumping additive, 4kg of PP fiber;

[0029] The cement is Portland cement P·I 42.5; the fly ash is above grade II; the water-retaining thickening material is a mixture of bentonite, grade one fly ash, hydroxypropyl methylcellulose ether, and latex powder. The weight ratio range is 4.5:5.5:0.1:0.09; the stabilizer is carbon black 330; the machine jet pumping additive is a mixture of sodium lauryl sulfate, bauxite, naphthalene-based water reducer or polycarboxylate admixture Formed, the weight ratio range of the three is 0.4:8.6:1.0;

[0030] Preparation steps: first mix fine aggregate, cement, water-retaining thickening material, and fly ash, and at the same time add redispersible latex powder, stabilizer, machine spray pumping additive, and PP fiber to mix evenly;

[0031] The perform...

Embodiment 3

[0036] Formula: 180kg of cement, 45kg of fly ash, 750kg of fine aggregate, 28kg of water-retaining thickening material, 8kg of redispersible latex powder, 4kg of stabilizer, 10kg of machine spray pumping additive, and 5kg of pp fiber;

[0037] The cement is Portland cement P·Ⅱ42.5; the fly ash is grade II. The water-retaining thickening material is a mixture of bentonite, first-grade fly ash, hydroxypropyl methylcellulose ether, and latex powder. The weight ratio range of the four is 4.8:5.1: 0.12: 0.08; the stabilizer is white carbon black; The machine spray pumping additive is a mixture of sodium lauryl sulfate, bauxite, naphthalene-based water reducer or polycarboxylate admixture, and the weight ratio range of the three is 0.5:8.3:1.1;

[0038] Preparation steps: first mix fine aggregate, cement, water-retaining thickening material, and fly ash, and at the same time add redispersible latex powder, machine spray pumping additive, and PP fiber to mix evenly;

[0039] Embodim...

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Abstract

The invention belongs to the field of premixed dry powder mortar, and relates to an improved machine-sprayable/pumpable mortar. The machine-sprayable/pumpable mortar is prepared from the following raw materials in parts by weight: 150-200 parts of cement, 50-30 parts of fly ash, 780-740 parts of fine aggregate, 5-10 parts of redispersible latex powder, 30-25 parts of water-retaining thickening material, 1-4 parts of stabilizer, 5-10 parts of machine-sprayable/pumpable additive and 3-5 parts of PP (polypropylene) fiber. The mortar can be delivered to the working planes of various floors by a sand pump and directly used for building various types of walling materials; and the mortar can also be directly sprayed and brushed on the wall surface by a spraying machine, thereby saving the time and labor, lowering the consumable, and enhancing the construction efficiency. The average masonry strength and tensile binding strength of the machine-sprayable/pumpable mortar are respectively better than those of the traditional in-field artificially-mixed mortar; and the machine-sprayable/pumpable mortar can enhance the adhesion stability with the wall base, reduces cracking, hollowing and other engineering construction common faults, and enhances the construction quality.

Description

technical field [0001] The invention belongs to the field of ready-mixed dry powder mortar, and in particular relates to an improved machine sprayable pumpable mortar. Background technique [0002] Dry-mixed mortar, also known as dry-mixed mortar, dry-mixed mortar or premixed (dry) mortar, refers to fine aggregates and inorganic binders, water-retaining thickening materials, A granular or powdery mixture of ingredients and additives mixed according to a certain ratio; in building construction, there are disadvantages in purely hand-painted construction, such as high labor intensity, long working hours, and labor shortage, resulting in low production efficiency. Thus affecting the progress of some construction nodes in the project construction; at the same time, due to the constraints of on-site production conditions, it cannot meet the requirements of the product for different raw materials, which affects the performance of the mortar; for example, after the main body of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 孙德锋顾云华胡野
Owner NANJING NEW BUILDING MATERIALS DAY CLOUD
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