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

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...

Examples

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...

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...

Examples

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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