Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO M 171:2005
• Năm ban hành / Publication date: 2005
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Specification for Sheet Materials for Curing Concrete
• Thay thế cho / Replace: AASHTO M171:2000
• Số trang / Page: 3

Phạm vi áp dụng / Scope of standard

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 materiais, to also reduce temperature rise in
concrete exposed to radiation from the sun. The following types are
included:

Curing Paper:

Regular.

White.

Polyethylene Film:

Clear.

White Opaque.

White-Burlap-Polyethylene Sheet.

The values stated in SI units are to be regarded as the
standard. Inch-pound units are provided in parentheses for
information only.

NOTE 1-This specification does not cover materials such as
burlap. cotton mats, or rugs uscd with additional applications of
watcr to maintain a water-saturated environment on such surfaces.
Procedures employing these materials are discussed in AC1 308R.
Sheet materials having additional charactcristics such as
insiilating propcrtics and thc ability to carry additional water to
the curing region are coiiiiiiercially availaùle but are not
currently addressed in this specification.

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.