Cement Testing
Portland cement, ordinary Portland cement, slag silicate cement, volcanic ash silicate cement, fly ash silicate cement, composite silicate cement, G-grade oil well cement, road silicate cement, fast hardening silicate cement, low heat slag silicate cement, expanded sulfoaluminate cement, phosphoaluminate cement, phosphate cement.
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Product Introduction
Detection range
Cement testing: Portland cement, ordinary Portland cement, slag silicate cement, volcanic ash silicate cement, fly ash silicate cement, composite silicate cement, G-grade oil well cement, road silicate cement, fast hardening silicate cement, low heat slag silicate cement, expanded sulfoaluminate cement, phosphoaluminate cement, phosphate cement
Cement product testing: cement manhole covers, cement self leveling, cement bricks, cement boards, cement mortar, cement pipes, etc.
Test items
Specific gravity and bulk density: The specific gravity of ordinary cement is 3:1, and the bulk density is usually 1300kg/m3.
Fineness: refers to the thickness of cement particles. The finer the particles, the faster the hardening, and the higher the early strength.
Setting time: The time required for cement mixing to start setting is called the initial setting time. The time required from adding water to completing solidification is called the final solidification time. The initial setting time of Portland cement is not earlier than 45 minutes, and the final setting time is not later than 12 hours.
Strength: The strength of cement should comply with national standards.
Volume stability: refers to the uniform performance of cement volume change during the hardening process. Cement contains a lot of impurities, which can cause uneven deformation.
Hydration heat: The interaction between cement and water produces an exothermic reaction. The continuous release of heat during the hardening process of cement is called hydration heat.
Standard viscosity: refers to the viscosity of the cement slurry when there is a certain resistance to the sinking of the standard test rod.
The number of samples extracted from each batch shall not be less than 16kg. The samples shall be divided into two equal parts, each weighing at least 8kg. One part shall be the inspection sample, and the other part shall be the backup sample.
Testing Standard
GB 175-2023 "General Portland Cement"
GB/T 1346-2024 "Method for Testing Water Consumption, Setting Time, and Stability of Cement Standard Consistency"
GB/T 17671-2021 "Test Method for Strength of Cement Mortar (ISO Method)"
GB/T 1345-2005 "Method for Testing the Fineness of Cement - Sieve Analysis Method"
GB/T 8074-2008 "Method for determination of specific surface area of cement - Brinell method"
GB/T 208-2014 "Method for determination of cement density"
GB/T 2419-2005 "Method for determination of flowability of cement mortar"
GB/T 750-2024 "Test Method for Cement Autoclave Stability"
GB/T 176-2017 "Methods for Chemical Analysis of Cement"
GB 31893-2015 "Limits and determination methods for water-soluble chromium (VI) in cement"
GB/T 3813-2015 "Method for determination of leachable heavy metals in cement mortar"
GB/T 45002-2024 "Test Method for Dry Shrinkage of Cement Mortar"
JTG 3420-2020 "Test Code for Cement and Cement Concrete in Highway Engineering"
GB/T 29450-2012 "Test Method for Drying Shrinkage and Cracking Performance of Cement Mortar and Concrete"
GB/T 16753-2021 "Test Method for Refractory Properties of Building Materials" (involving cement-based materials)
was established in 2011. As a national high-tech enterprise recognized by the Zhejiang Provincial Higher People's Court as a judicial authentication institution for construction engineering quality, we specialize in structural performance testing and safety assessment of construction projects, special equipment, communication towers, electromagnetic environments, large bridges, and building safety appraisal.
The company has more than 100 professional and technical personnel, over 90% of whom hold various medium and senior technical certificates. Equipped with complete testing equipment worth over RMB 10 million, our business scope covers the whole country.
