Limestone machine-made sand dry-mixed mortar and preparation method thereof

A technology for dry-mixed mortar and machine-made sand, applied in the field of building materials, can solve the problems of high mud content, high proportion of coarse particles and fine powder, poor particle gradation, etc. Effect

Inactive Publication Date: 2014-07-16
GUANGXI YUFENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pebble machine-made sand particles have edges and corners, the particle gradation is poor, the proportion of coarse particles and fine powder is high, and the mud content is high. These disadvantages greatly restrict the application of machine-made sand in ready-mixed mortar.

Method used

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  • Limestone machine-made sand dry-mixed mortar and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh the raw materials according to the following parts by weight: cement 90kg, fly ash 80kg, machine-made sand 830kg, mortar water-retaining plasticizer 0.8kg, water 135kg;

[0026] (2) Pour the weighed dry raw materials into the blender and dry mix for 180s;

[0027] (3) According to the consistency at the construction site, add mixing water and stir evenly.

[0028] Among them, the cement strength grade is P O42.5, the fly ash is grade II, the limestone machine-made sand particle size is 1.18-3.5mm is the first grade, and the particle size is below 1.18mm is the first grade, and the mixing weight ratio of the two is 0.8:1 ,

[0029] The resulting mortar mixture has a consistency of 78mm, a 2h consistency loss rate of 19.8%, a water retention rate of 93.6%, and an apparent density of 1860 kg / m 3 , The 7-day strength is 4.3MPa, and the 28-day strength is 6.5MPa. The basic performance of the mortar meets the requirements of the national standard "Ready-mixed Mor...

Embodiment 2

[0031] (1) Weigh the raw materials according to the following parts by weight: cement 105kg, fly ash 80kg, machine-made sand 815kg, mortar water-retaining plasticizer 0.8kg, water 135kg;

[0032] (2) Pour the weighed dry raw materials into the blender and dry mix for 180s;

[0033] (3) According to the consistency at the construction site, add mixing water and stir evenly.

[0034] Among them, the cement strength grade is P O42.5, the fly ash is grade II, the limestone machine-made sand particle size is 1.18-3.5mm is the first grade, and the particle size is below 1.18mm is the first grade, and the mixing weight ratio of the two is 0.8:1 ,

[0035] The resulting mortar mixture has a consistency of 76 mm, a 2-hour consistency loss rate of 20.2%, a water retention rate of 94.9%, and an apparent density of 1860 kg / m 3 , The 7-day strength is 5.5MPa, and the 28-day strength is 8.6MPa. The basic performance of the mortar meets the requirements of the national standard "Ready-mix...

Embodiment 3

[0037] (1) Weigh the raw materials according to the following parts by weight: cement 120kg, fly ash 75kg, machine-made sand 805kg, mortar water-retaining plasticizer 0.8kg, water 138kg;

[0038] (2) Pour the weighed dry raw materials into the blender and dry mix for 180s;

[0039] (3) According to the consistency at the construction site, add mixing water and stir evenly.

[0040] Among them, the cement strength grade is P O42.5, the fly ash is grade II, the limestone machine-made sand particle size is 1.18-3.5mm is the first grade, and the particle size is below 1.18mm is the first grade, and the mixing weight ratio of the two is 0.8:1 ,

[0041] The resulting mortar mixture has a consistency of 77mm, a 2h consistency loss rate of 19.2%, a water retention rate of 94.5%, and an apparent density of 1880 kg / m 3 , The 7-day strength is 7.4MPa, and the 28-day strength is 13.2MPa. The basic performance of the mortar meets the requirements of the national standard "Ready-mixed M...

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Abstract

The invention relates to a limestone machine-made sand dry-mixed mortar and a preparation method thereof, belonging to the field of building materials. The limestone machine-made sand dry-mixed mortar comprises the following raw materials in parts by weight: 10-25 parts of cement, 5-8 parts of coal ash, 70-85 parts of machine-made sand and 0.06-0.08 part of mortar water-retention plasticizing agents, wherein the machine-made sand is limestone machine-made sand. The limestone machine-made sand dry-mixed mortar disclosed by the invention has the advantages of good cohesiveness, high water-retention rate, high compressive strength, good operability, economy, environmental protection, resource saving and the like, and is a green building material with excellent properties. The preparation method disclosed by the invention is simple and low in cost.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a limestone machine-made sand dry-mixed mortar and a preparation method thereof. Background technique [0002] Dry-mixed mortar is a new type of green and environmentally friendly building material. Since entering the 21st century, my country's dry-mixed mortar industry has gradually achieved a successful transition from the market introduction period to the rapid development period. The development of dry-mixed mortar has very important significance: (1) It is conducive to improving the quality and construction efficiency of construction projects, reducing the (2) Significant benefits in energy saving and emission reduction; (3) Open up a new way for the comprehensive utilization of resources; (4) Help promote the structural adjustment of the cement industry. Nowadays, dry-mixed mortar is being vigorously promoted all over the country, especially in developed coasta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/28
Inventor 韦帮雄梁亦文黄崇弈李绍新张芳
Owner GUANGXI YUFENG GRP
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