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Manufactured sand high-impermeability dry-mixed decorative mortar

A technology for decorative mortar and machine-made sand, applied in the field of building materials, can solve the problems of poor impermeability and waterproof ability of mortar, contrary to expected functions of mortar, and increase in cost of mortar, so as to meet the needs of aesthetics, sufficient operating time, and impermeability. The effect of improved performance

Inactive Publication Date: 2019-02-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding emulsifier, dispersing aid and dibutyl phthalate and other components to the mortar can make the mortar have good dispersion performance, but the addition of a large amount of dispersant will increase the cost of the mortar and deteriorate the durability
[0005] CN108516786A "A kind of energy-saving and anti-cracking tidal insulation mortar and its preparation method" adopts modified river sludge mixed with river sludge, Wudalianchi volcanic ash and calcined gypsum, and the dosage reaches about 75%, and the compressive strength of the product is equivalent High, which is beneficial to construction, but high shrinkage will cause certain cracking problems
[0006] CN105731944A "A High Impermeability Waterproof Mortar" adds about 1% of cellulose ether to improve the water retention rate of the mortar. The amount of cellulose ether is high, and the incorporation of cellulose ether will introduce a large number of air bubbles, resulting in There are large connecting holes inside, which makes the anti-seepage and waterproof ability of the mortar worse, which is contrary to the expected function of the mortar

Method used

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  • Manufactured sand high-impermeability dry-mixed decorative mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A machine-made sand high-impermeability dry-mixed decorative mortar. The raw materials for preparing the mortar include the following materials in parts by weight: 15 parts of ordinary Portland cement, 2.8 parts of fly ash, 81 parts of aggregate machine-made sand, and 0.4 parts of binder part, 0.8 part of anti-cracking and seepage reducing agent, and 0.09 part of water reducing agent; the specific preparation method is as follows:

[0032] Weigh each component material (cementing material, aggregate, admixture) for preparing the mortar according to the ratio, and dry-mix fully; according to the set water-binder ratio of 0.48, weigh the water consumption, and then mix each group after dry-mixing Pour it into the mixing container. The mixing procedure is: after stirring slowly at a low speed (130-150r / min) for 60s, scrape the powder adhered to the wall into the slurry, and then stir quickly (250-300r / min). After 180s, the machine-made sand high impermeability decorative m...

Embodiment 2

[0036] A machine-made sand high-impermeability dry-mixed decorative mortar. The raw materials for preparing the mortar include the following materials in parts by weight: 17 parts of ordinary Portland cement, 0.5 parts of calcined sludge, 3.5 parts of fly ash, and inorganic iron oxide red pigment 0.5 parts, 77 parts of aggregate machine-made sand, 0.5 parts of binder, 1 part of anti-cracking and seepage reducing agent, 0.086 parts of water reducing agent;

[0037] Mortar was prepared by the same method as in Example 1 with a water-binder ratio of 0.39, and the performance parameters of the mortar were tested by the same test method as in Example 1. See sample 2 in Attached Table 1 for specific results.

[0038] From the data of sample 2 in attached table 1, it can be seen that the compressive strength of the prepared mortar reaches 42.9MPa, and the anti-water osmotic pressure reaches 1.5MPa (Note: the maximum water pressure value set by the mortar impermeability instrument, the...

Embodiment 3

[0040] A machine-made sand high-impermeability dry-mixed decorative mortar. The raw materials for preparing the mortar include the following materials in parts by weight: 16 parts of ordinary Portland cement, 3 parts of fly ash, 0.6 parts of inorganic iron oxide red pigment, aggregate mechanism 79 parts of sand, 0.5 parts of binder, 0.9 parts of anti-cracking and seepage reducing agent, and 0.078 parts of water reducing agent;

[0041]The water-binder ratio is 0.42 and the same method as in Example 1 is used to prepare mortar, and the same test method as in Example 1 is used to test the performance parameters of the mortar. For specific results, see Sample 3 in Attached Table 1.

[0042] From the data of sample 3 in attached table 1, it can be seen that the compressive strength of the prepared mortar reaches 40.5MPa, and the anti-water osmotic pressure reaches 1.5MPa (Note: the maximum water pressure value set by the mortar impermeability instrument, the same below) There is n...

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Abstract

The invention provides manufactured sand high-impermeability dry-mixed decorative mortar, made from, by weight, 15-19 parts of ordinary Portland cement, 0-0.6 part of calcined sludge, 2.8-4 parts of flyash, 0-0.6 part of an inorganic pigment, 74-81 parts of aggregate manufactured sand, 0.4-0.6 part of a binder, 0.8-1.2 parts of an expanding agent, and 0.07-0.09 part of a water reducer. The manufactured sand high-impermeability dry-mixed decorative mortar is a mortar composition having good field constructability, good sagging resistance, good water-holding capacity, and high impermeability; the manufactured sand high-impermeability dry-mixed decorative mortar has low cost and is applicable to a facing layer in a tunnel, having high impermeability requirement, and other construction environments having impermeability requirement.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a machine-made sand high-impermeability dry-mixed decorative mortar. Background technique [0002] The sand used in civil engineering in my country has always been dominated by natural sand, but due to excessive exploitation of natural sand, there are problems such as blocking rivers, endangering flood control and water conservancy facilities, and destroying cultivated land. Therefore, my country has started research on machine-made sand since the 1960s. Machine-made sand is made by mechanical crushing and screening. Its particles are sharp, rough and angular. At the same time, it inevitably contains a certain amount of limestone powder. This is the most significant difference between machine-made sand and natural sand. At present, sufficient research has been carried out on the application of machine-made sand in concrete, but the research on the application of mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/04C04B18/04C04B18/08
CPCC04B18/0436C04B18/08C04B20/04C04B28/04C04B2201/10C04B2201/50C04B24/2641C04B24/24C04B2103/0068C04B2103/54C04B14/06Y02W30/91
Inventor 赵青林蒙若男胡相锋张子龙
Owner WUHAN UNIV OF TECH
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