Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: BS 7979-TC:2020
• Năm ban hành / Publication date: 2020
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Tracked Changes (Redline) - Specification for limestone fines for use with Portland cement
• Chỉ số phân loại Quốc tế (ICS) / By field: 91.100.10 - Xi măng. Thạch cao. Vữa
• Số trang / Page: 45

Phạm vi áp dụng / Scope of standard

This British Standard specifies requirements for the production, chemical composition and mechanical and physical properties of limestone fines for use in combination with CEM I Portland cement strength class 42.5 or higher conforming to BS EN 197-1 as a component of concrete, mortar or grout. It also specifies requirements for marking, provision of information, sampling and testing for acceptance at delivery, and conformity criteria for the manufacturer's autocontrol system.

Guidance on the use of limestone fines is given in Annex A.