Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM C171-16
• Năm ban hành / Publication date: 2016
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Specification for Sheet Materials for Curing Concrete
• Chỉ số phân loại Quốc tế (ICS) / By field: 91.100.30 - Bêtông và sản phẩm bêtông
• Số trang / Page: 2

Phạm vi áp dụng / Scope of standard

1.1 This specification covers materials in sheet form used for covering the surfaces of hydraulic cement concrete to inhibit moisture loss during the curing period and, in the case of the white reflective type materials, to also reduce temperature rise in concrete exposed to radiation from the sun. The following types are included:

1.1.1 Curing Paper: 

1.1.1.1 Regular.

1.1.1.2 White.

1.1.2 Polyethylene Film: 

1.1.2.1 Clear.

1.1.2.2 White Opaque.

1.1.3 White-Burlap-Polyethylene Sheet.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

Note 1: This specification does not cover materials such as burlap, cotton mats, or rugs used with additional applications of water to maintain a water-saturated environment on such surfaces. Sheet materials having additional characteristics such as insulating properties and the ability to carry additional water to the curing region are commercially available but are not currently addressed in this specification.

1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes shall not be considered as requirements of the standard.