Cement quality appraisal

Due to the profit-seeking interests of some manufacturers and unscrupulous dealers, there is still a large amount of inferior cement in the home decoration and building materials market. Cement quality issues have become a prominent hidden danger in building materials products. The use of low-quality cement in decoration will cause walls, ceilings, and pavements to appear pink, peeling, or peeling off, and even the decorative materials that have been applied will loosen and fall off. Moreover, inferior cement can also pose a serious threat to human life and health.
Zhongke Testing provides building materials product quality appraisal services. It can carry out appraisal work on whether there are problems with cement-related quality, issue professional and reliable inspection reports, and assist courts and enterprises in resolving product quality disputes.

GB/T 29417-2012 Test method for drying shrinkage cracking performance of cement mortar and concrete
GB/T 15231-2008 Test method for performance of glass fiber reinforced cement
GB/T 15231.5-1994 Test method for performance of glass fiber reinforced cement Impact resistance
GB/T 15231.4-1994 Test methods for properties of glass fiber reinforced cement Tensile properties
GB/T 15231.3-1994 Test methods for properties of glass fiber reinforced cement Flexural properties
GB/T 15231.1-1994 Test methods for properties of glass fiber reinforced cement Bulk density, moisture content and glass fiber content
GB/T 15231.2-1994 Test methods for properties of glass fiber reinforced cement Compressive strength
JTG 3420-2020 Test procedures for highway engineering cement and cement concrete
GB/T 25029-2010 Steel slag road cement
GB/T 3183-2017 Masonry cement
GB/T 201-2015 Aluminate cement

When a manufacturer built a factory, it laid concrete floors and also built concrete roads at the entrance to facilitate the transportation of goods.
However, after the completion of the project, after a period of use, the concrete pavement appeared cracked and damaged in many places, seriously affecting the entry and exit of trucks. The manufacturer believes that the construction project team cut corners and has unshirkable responsibility, while the construction party believes that the manufacturer's goods are overweight, causing the concrete road to be overwhelmed. The dispute between the two parties went to court and a product quality appraisal agency was entrusted to conduct appraisal. The
expert team immediately went to the site to conduct an inspection and conduct a quality analysis of the concrete road. After repeated verification through laboratory experiments, the expert group finally gave an identification opinion. The main reasons for the poor quality of this concrete road are as follows:
1. The actual activity of the concrete cement is low and the adhesion is weak, resulting in a decrease in strength;
2. The strength of the stones is low. After component analysis, it was found that the organic impurities in the stones are high, which affects the quality;
3. There are also problems with the quality of the admixtures, which affects the cement forming strength.