What is barite plaster (X-ray protective): application technology and consumption per 1 m2

A particular kind of plaster known as barite plaster contains barite, a mineral with a high density and superior radiation-absorbing capabilities. Because of its distinct makeup, barite plaster is the perfect material to use when constructing X-ray protective surfaces, especially in settings like labs, hospitals, and other places where minimizing radiation exposure is important. The plaster’s use of barite effectively blocks out X-ray radiation, making the working and patient environments safer.

For barite plaster application technology to be effective, there are a few essential steps involved. To ensure good adhesion, the surface must first be thoroughly cleaned and prepared. To strengthen the bond between the substrate and the plaster, a primer is usually sprayed on the exterior. Next, great care is taken to ensure that the right amounts of barite, cement, sand, and water are added to the barite plaster mix. Applying this mixture in layers requires letting each coat dry before adding another. For the best radiation protection, proper application techniques are necessary to achieve the required thickness and uniformity.

Regarding consumption, the quantity of barite plaster required per square meter can change based on the particular needs and layer thickness. Generally speaking, 20 to 30 kg of barite plaster per square meter might be needed for standard protective measures. If more layers are required for greater levels of protection, this may rise. Achieving the required protective qualities with minimal material waste requires precise measurement and careful application.

In conclusion, barite plaster is an essential component in settings that require X-ray protection. Its application necessitates exacting methods and meticulous planning to guarantee efficient radiation protection. In areas where radiation exposure is a concern, knowing the consumption rates and appropriate application techniques can help get the best results and offer safety and peace of mind.

Scope

A dry mixture based on barite filler, a white powder, can be used as plaster to level surfaces. The primary goal of use is to keep people safe in rooms that are close to areas where X-rays are used.

• dental clinics, X-ray, tomography rooms;
• industrial enterprises where there are technological processes using radioactive substances;
• laboratories, research institutes that conduct tests using gamma rays;
• storage of radioactive elements.

Expensive lead screens are replaced with X-ray-protective barite plaster. Barite slabs are used when a higher level of protection is required.

Requirements of sanitary authorities for the application of barite plaster

The State Sanitary and Epidemiological Surveillance is responsible for maintaining public health and sanitation. The SanPiN 2.6.1.1192-03 "Hygienic requirements for X-ray rooms" governs the use of barite plaster. In terms of barite coating supervision, this entails verifying the mixture’s barite content in accordance with GOST 4682-84’s technical specifications and the plaster consumption based on the protective layer’s thickness.

The shielding coating test reports, which are collected in the form of the safety standards system GOST 12.4.217-2001, are used to verify that the indicators are in compliance.

Procedure for preparing the mixture of barite concrete M200

Plastering surfaces, pouring floors, pouring walls using formwork, and creating concrete block partitions all require a protective solution with a strength of 200 kg/cm². The ingredients for barite concrete can be mixed entirely dry or with a 6 liter liquid hardener and 24 kg of barite powder mixed with polymer additives.

1. Place the components in a concrete mixer, mix until smooth.
2. Add water in small portions until the required consistency is achieved. For plastering, the mixture is made more liquid, and the floors and walls are filled with a viscous solution.
3. Prepared barite concrete must be used within 45 minutes: after this time, polymerization begins, irreversible drying of the mixture.

In the latter case, the number of workers laying the solution determines how many loaded components the master must calculate.

Consumption per 1 m2

Lead shields are recommended as protection when dealing with objects that contain radioactive sources, according to project documentation. The maximum power of gamma radiation is used to calculate the thickness of the plates.

Plaster layer thickness is determined by taking the lead shield’s thickness into consideration. Since the barite content of the mixture varies between 85 and 95 percent, it is challenging to pinpoint the exact value because different manufacturers produce barite powder of varying quality.

The table shows the relationship between the thickness of barite plaster coatings and the amount of plaster used per square meter, which is determined by the thickness of the lead shield.

The degree of protection is also modified if the equipment’s design capacity changes. Coordination of the corrections with the sanitary authorities is required in this instance.

A specialized material called barite plaster, sometimes referred to as X-ray protective plaster, is used in industrial and medical settings as a radiation shield. It contains barite, a mineral abundant in barium sulfate that efficiently absorbs gamma and X-ray radiation. In order to apply barite plaster and attain the required thickness, the surface must be prepared, the plaster must be mixed to the proper consistency, and the plaster must be spread evenly. Depending on the necessary degree of radiation shielding, barite plaster typically uses 15 to 20 kg per square meter for effective protection. This reduces the risk of radiation exposure and guarantees a secure atmosphere.

Plaster components

Barite sand, which is white and gray with a fraction of up to 1.25 mm, forms the foundation of the mixture. Portland cement or magnesia cement is the binding material. When quickening the hardening process is required, the latter is employed. X-ray protective compounds are defined as barite concrete, cement-barite, and magnesia-barite based on the composition of the components and their bond.

There are two ways to use barite plaster to effectively protect against radiation. The first is to use 95% sand in the mixture by using high-grade cement (M500). The second step involves thickening the layer that is applied; to achieve this, use M300 binder with an 85% filler concentration. Both approaches produce results that are on par.

Work execution technology

The thick barite coating, ranging from 1 cm to 0.5 m and beyond, is one of its characteristics. The protective layer application technique for barite plaster relies on the plaster’s estimated thickness. The work is completed in phases according to the order specified by the regulations. The surface to be covered is prepared, just like when applying regular plaster: it is free of dirt, screws, nails, and other debris; cracks and potholes are sealed with cement-sand mortar. There are certain aspects of barite screen laying that need to be considered.

Main stages

The surface that has been prepped is dust- and grease-free. The base is primed to improve the solution’s adherence.

The applied layer thickness and the surrounding temperature affect how long it takes for the layers to dry.

Features of applying plaster

Applying barite plaster involves different technology and technique than simply laying down simple surface-leveling solutions. The requirement to create multi-layer coatings and a significant amount of a dry mixture are the causes of the specificity.

• optimal conditions: ambient temperature +15…+35°C, humidity level 75%;
• the mixture is applied in a layer up to 1 cm without the use of equipment for spraying the solution, t.e. manually;
• the place of plastering work is covered from precipitation, shaded;
• formwork technology is required if the design coating thickness is ≥2 cm;
• it is necessary to install a concrete screed over a concrete barite floor to strengthen the base for X-ray equipment.

The barite solution is introduced into the adjacent room by two centimeters when plastering ceilings. For ceiling surfaces, a minimum layer of 50 mm is required.

Plaster for X-ray rooms

The primary goal of coatings based on barite sand is to shield clinic patrons and medical staff from the damaging effects of gamma rays. A finishing material that shields against penetrating rays is called X-ray protective plaster.

The following circumstances apply to the use of betonbarite plaster in X-ray rooms and nearby rooms:

• the thickness of the protective layer is at least 2.5 cm, which corresponds to facing the surfaces with 2 mm lead plates;
• strict adherence to the instructions for preparing the barite mixture, technology, and application regulations.

These requirements must be met in order to protect the life and health of those whose jobs require them to spend extended periods of time near radiation sources. When it comes to economics, barite plaster is superior to lead screens. Despite having a higher consumption, betonbarite is less expensive and has similar protective qualities.

A specific kind of plaster called barite plaster is employed because of its ability to block X-rays. It is composed of a binder, a heavy mineral called barite, and both. This combination is a must-have material in labs, hospitals, and other settings where radiation protection is critical because it gives the required density to block X-rays.

To guarantee its efficacy, barite plaster application must adhere to a precise procedure. To increase adhesion, the surface needs to be appropriately primed, cleaned of dust and debris, and sometimes prepped. After that, layers of plaster are applied, mixed in accordance with the manufacturer’s instructions. It is necessary to let each layer fully dry before applying the next. This layering method guarantees optimal protection and consistent coverage.

The necessary thickness of the protective layer must be taken into account when estimating the amount of barite plaster needed. Generally, a layer of about 2.5 to 3 centimeters is required for standard radiation protection. To reach this thickness, you will typically need to use between 30 and 35 kilograms of barite plaster per square meter. Depending on the particular product and the necessary level of protection, this may change.

All things considered, barite plaster is an essential component for establishing secure surroundings in locations where radiation exposure poses a risk. The effectiveness of the protective measures is ensured by their proper application and accurate material calculations. You can achieve dependable and long-lasting radiation protection by mixing and applying barite plaster according to the recommended guidelines.

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