Building Products Testing
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Note: this service is for Research Use Only and Not intended for clinical use.
Alfa Chemistry Testing Lab is the world's leading third-party testing company, which provides customized building materials testing solutions for building materials R&D companies, developers, builders, government agencies and individuals.
There are many types of building materials in construction projects, which are roughly divided into structural materials, decorative materials and other special materials. Structural materials include wood, bamboo, stone, cement, concrete, metal, brick, ceramic, glass, engineering plastics, composite materials, etc.; decorative materials include various coatings, paints, veneers, various color tiles, with special effects glass, etc.; special materials are used for waterproof, moisture, corrosion, fire, flame retardant, sound insulation, heat insulation, heat preservation, sealing, etc. Due to the wide variety of materials required for construction, any material problems will have a serious impact on the quality of construction projects, putting forward higher requirements for the quality supervision and inspection of building materials, and construction enterprises should strictly control the quality of building materials when carrying out construction activities, so as to ensure the overall quality of the project. Therefore, it is significant to strengthen the quality supervision and testing of building materials.
Building products that can be tested by Alfa Chemistry include:
Alfa Chemistry's testing solutions for fertilizer include but are not limited to:
Component analysis
Mechanical property testing
Fire resistance testing
Aging resistance testing
Salt spray testing
Electrical performance testing
Environmental testing
Alfa Chemistry Testing Lab provides customized building materials testing solutions and authoritative third-party testing reports for building materials R&D companies, developers, builders, government agencies and individuals to meet clients' testing needs. For more information about building products testing, please feel free to contact Alfa Chemistry's experts.
Techniques for building products testing
Concrete Material Testing Techniques
Strength Testing: By testing concrete samples, the compressive strength, flexural strength, and other indicators are measured to evaluate the quality of the concrete.
Moisture Content Testing: The moisture content in concrete is measured to determine the drying shrinkage and durability of the concrete.
Chloride Ion Penetration Testing: By measuring the chloride ion content in the concrete, the resistance to chloride ion penetration and the durability of the concrete can be evaluated.
Steel Material Testing Techniques
Chemical Composition Analysis: Through chemical composition analysis of the steel, the carbon content, sulfur content, and other indicators are determined to judge the quality and strength of the steel.
Metallographic Testing: Microscopic observation of the steel's microstructure is conducted to determine the grain size and organizational structure, evaluating the performance and reliability of the steel.
Hardness Testing: By measuring the hardness of the steel, the strength and wear resistance can be evaluated.
Timber Testing Techniques
Moisture Content Testing: By measuring the moisture content in the timber, the drying degree and stability can be determined.
Density Testing: By measuring the density of the timber, the quality and strength can be judged.
Strength Testing: Bending tests, compression tests, and other tests are performed on the timber to evaluate its bending strength, compressive strength, and other properties.
Brick and Tile Material Testing Techniques
Water Absorption Testing: The water absorption rate of the brick and tile materials is measured to evaluate their durability and water resistance.
Compressive Strength Testing: By testing the brick and tile samples, the compressive strength is measured to evaluate their quality and strength.
Dimensional Testing: The dimensions of the bricks and tiles are measured to ensure they meet relevant standards and construction requirements.
Glass Material Testing Techniques
Wind Pressure Resistance Testing: Through wind pressure testing on the glass, its wind pressure resistance and safety can be evaluated.
Optical Performance Testing: By measuring the transmittance, reflectance, and other indicators of the glass, its optical performance and quality can be evaluated.
Thermal Performance Testing: The thermal conductivity, thermal expansion coefficient, and other parameters of the glass are measured to evaluate its thermal insulation and heat preservation performance.
Coating Material Testing Techniques
Thickness Testing: By measuring the thickness of the coating, the coating quality and durability can be determined.
Adhesion Testing: The adhesion between the coating and the substrate is tested to evaluate the coating's adhesion performance.
Weathering Resistance Testing: By simulating natural environmental conditions, the weathering resistance and aging resistance of the coating can be evaluated.
Industry articles
Determination of Capillary Absorption Coefficient of Porous Building Materials
Lu, Jiang, Ke Wang, and Ming-Liang Qu. Journal of Building Engineering 28 (2020): 101091.
The transport of liquid water in porous building materials has a significant impact on the hygrothermal performance of the materials. The capillary absorption coefficient is a key parameter that characterizes the water absorption capacity of porous building materials, and it is crucial for the simulation of moisture transport.
Using an improved continuous measurement method, still based on the partial immersion strategy, the data is continuously and automatically collected during the absorption test, without the need for operator intervention. Taking lightweight, high-porosity autoclaved aerated concrete (AAC) as a typical porous building material, the impact of this method on the measurement of the capillary absorption coefficient was investigated. The results show that the improved continuous method avoids the process of intermittent sampling and weighing, making it more convenient than the standard method.
Measurement Methods for Moisture Diffusivity of Porous Building Materials
Ren, Peng, Chi Feng, and Hans Janssen. Building and Environment 164 (2019): 106344.
Moisture diffusivity is an important material property for conducting hygrothermal analysis of buildings and building environments. The measurement methods for moisture diffusivity of porous building materials include the X-ray method, the ruler method, and the multi-step method.
X-ray attenuation method: The principle of this method is that water absorbs X-rays, so the greater the water content in the sample, the stronger the attenuation.
Ruler method: The ruler method is a simple modification of the standard capillary absorption test. During the first stage of the capillary absorption process, not only the wet mass of the sample is measured periodically, but also the height of the moisture front from the bottom. For each measurement, the λ value at the boundary can be obtained through a formula, and the average value (λf, m•s-0.5) is finally calculated.
Multi-step method: The multi-step method is another simple improvement of the standard capillary absorption test. Unlike the X-ray and ruler methods, the moisture diffusivity is not represented as a continuous function, but as a piecewise constant function with n different levels.
Measurement of Pore Size Distribution in Building Materials
Dujardin, Nicolas, et al. Construction and Building Materials 245 (2020): 118417.
The characterization of thermophysical properties has been used to study the porosity of various materials, particularly for insulation applications (vacuum insulation panels, building walls). For such materials, the thermal conductivity of the sample is influenced by the thermal conductivity of the air filling the pores. Therefore, the pore size distribution can be determined by measuring the thermal conductivity at different gas pressures.
The porous structure of composites and cement has been studied using the thermal method. This method is applicable to brittle materials and is based on existing models that can determine the pore size distribution.
First, the existing analytical models are presented. The thermal conductivity is simulated by homogenizing the medium under study into N fluid phases and series/parallel solid phases. Second, some extensions of this model are proposed. In the case of a single pore size, a finer pore size distribution can be obtained through the regularization law.
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