Novel cement-based multi-shield dry powder mortar

Abstract

The invention discloses a novel cement-based multi-shield dry powder mortar, which is prepared from 20% to 40% of cement, 35% to 55% of barite aggregate, 20% to 35%. of neutron shield aggregate, 0% to 0.25% of superplasticizer, 0% to 0.50% of redispersible latex powder, 0% to 0.05% of a water retaining agent, and 0% to 0.5% of an antifoaming agent. The particle size of the largest particles in the aggregate is 2.0 to 5.5 mm, the particle size of the smallest particles is 0.35 to 0.75 mm, and the particle size of the other particless is of continuous gradation. The novel cement-based multi-shield mortar prepared by the invention has good X-ray, gamma-ray, neutron ray shield performance, and good mechanical properties, waterproof performance and construction performance, and has the advantages of high late strength, excellent durability, low cost, etc.

Description

technical field

[0001] The invention belongs to the field of preparation of special building materials and the field of comprehensive utilization of radiation shielding, in particular to a novel cement-based multi-component shielding dry powder mortar. Background technique

[0002] With the rapid development of industries such as nuclear power, nuclear-powered ships, irradiation processing, non-destructive testing, and radiotherapy, high-energy radiation has been widely used in many fields such as industry, medical treatment, scientific research, and military affairs. The resulting radiation safety and The issue of protection becomes more and more important and becomes the key to its further development.

[0003] The cement-based anti-radiation mortar is composed of Portland cement as the cementitious material, plus anti-radiation aggregates and admixtures in a certain proportion. According to actual needs and construction environment, by adjusting the formula, the required...

Examples

Embodiment 1

[0018] A new type of cement-based multi-component shielding dry powder mortar, including the following components by weight percentage: 20% of PO42.5 cement, 54.2% of barite sand, 12% of boron-rich slag, 13% of attapulgite, polycarboxylate The acid superplasticizer is 0.05%, the vinyl acetate is 0.35%, the methyl cellulose ether is 0.05%, and the polyethylene glycol is 0.35%.

[0019] Prepare cement-based multi-component shielding dry powder mortar according to the mass percentage specified above, mix well with mixing water with 11.5% of the total mass of raw materials, prepare samples, and cure to the specified age to measure various properties.

Embodiment 2

[0021] A new type of cement-based multi-component shielding dry powder mortar, by weight percentage, including the following components: 26% of PO42.5 cement, 49.75% of barite sand, 10.5% of boron ore, 13% of attapulgite, polycarboxylic acid The superplasticizer is 0.05%, the vinyl acetate is 0.3%, the methyl cellulose ether is 0.05%, and the polyethylene glycol is 0.35%.

[0022] Prepare cement-based multi-component shielding dry powder mortar according to the mass percentage specified above, mix well with mixing water with 11.5% of the total mass of raw materials, prepare samples, and cure to the specified age to measure various properties.

Embodiment 3

[0024] A new type of cement-based multi-component shielding dry powder mortar, including the following components in terms of weight percentage: 30% of PO42.5 cement, 40% of barite sand, 11.4% of boron ore, 18% of serpentine, and high-efficiency polycarboxylic acid The water reducing agent is 0.1%, the vinyl acetate is 0.15%, the methyl cellulose ether is 0.1%, and the polyethylene glycol is 0.25%.

[0025] Prepare cement-based multi-component shielding dry powder mortar according to the mass percentage specified above, mix well with mixing water with a total mass of 12.5% ​​of raw materials, prepare samples, and maintain to the specified age to measure various properties.

technical field

[0001] The invention belongs to the field of preparation of special building materials and the field of comprehensive utilization of radiation shielding, in particular to a novel cement-based multi-component shielding dry powder mortar. Background technique

[0002] With the rapid development of industries such as nuclear power, nuclear-powered ships, irradiation processing, non-destructive testing, and radiotherapy, high-energy radiation has been widely used in many fields such as industry, medical treatment, scientific research, and military affairs. The resulting radiation safety and The issue of protection becomes more and more important and becomes the key to its further development.

[0003] The cement-based anti-radiation mortar is composed of Portland cement as the cementitious material, plus anti-radiation aggregates and admixtures in a certain proportion. According to actual needs and construction environment, by adjusting the formula, the required...

Examples

Embodiment 1

[0018] A new type of cement-based multi-component shielding dry powder mortar, including the following components by weight percentage: 20% of PO42.5 cement, 54.2% of barite sand, 12% of boron-rich slag, 13% of attapulgite, polycarboxylate The acid superplasticizer is 0.05%, the vinyl acetate is 0.35%, the methyl cellulose ether is 0.05%, and the polyethylene glycol is 0.35%.

[0019] Prepare cement-based multi-component shielding dry powder mortar according to the mass percentage specified above, mix well with mixing water with 11.5% of the total mass of raw materials, prepare samples, and cure to the specified age to measure various properties.

Embodiment 2

[0021] A new type of cement-based multi-component shielding dry powder mortar, by weight percentage, including the following components: 26% of PO42.5 cement, 49.75% of barite sand, 10.5% of boron ore, 13% of attapulgite, polycarboxylic acid The superplasticizer is 0.05%, the vinyl acetate is 0.3%, the methyl cellulose ether is 0.05%, and the polyethylene glycol is 0.35%.

[0022] Prepare cement-based multi-component shielding dry powder mortar according to the mass percentage specified above, mix well with mixing water with 11.5% of the total mass of raw materials, prepare samples, and cure to the specified age to measure various properties.

Embodiment 3

[0024] A new type of cement-based multi-component shielding dry powder mortar, including the following components in terms of weight percentage: 30% of PO42.5 cement, 40% of barite sand, 11.4% of boron ore, 18% of serpentine, and high-efficiency polycarboxylic acid The water reducing agent is 0.1%, the vinyl acetate is 0.15%, the methyl cellulose ether is 0.1%, and the polyethylene glycol is 0.25%.

[0025] Prepare cement-based multi-component shielding dry powder mortar according to the mass percentage specified above, mix well with mixing water with a total mass of 12.5% ​​of raw materials, prepare samples, and maintain to the specified age to measure various properties.