Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO MP 16:2013
• Năm ban hành / Publication date: 2013
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Specification for Reclaimed Concrete Aggregate (RCA) for Use as Coarse Aggregate in Hydraulic Cement Concrete
• Thay thế cho / Replace: AASHTO MP 16:2010
• Số trang / Page: 9

Phạm vi áp dụng / Scope of standard

This specification covers coarse aggregate derived from
reclaimed concrete for use in hydraulic cement concrete. The
specification is not intended for use when lightweight,
high-density, or other specialty concrete applications are
required. When aggregate materials are properly processed and
manufactured to the requirements of this specification, combined
and mixed in accordance with the appropriate requirements, and
placed, consolidated, and cured properly, a concrete structure of
acceptable strength and durability can be produced. Introducing
reclaimed concrete aggregate (RCA) into concrete, however, requires
the use of quality control and quality assurance procedures to
ensure that deleterious materials that might be present in the
reclaimed concrete aggregate will not adversely impact the quality
of the concrete product.

Best practice applications for using reclaimed concrete
aggregate in concrete shall consist of concrete pavements,
cement-treated base courses, sidewalks, median barriers, curbings,
and other nonstructural applications.

Note 1-Caution should be exercised if reclaimed
concrete aggregate is considered for use in structural
applications. The presence of deleterious materials and the
variability in the source concrete may produce inconstant
volumetric properties and affect the properties of the concrete
produced. Two properties of concern include dimensional stability
and creep.

Because reclaimed concrete aggregate is a recycled material,
various state and local jurisdiction laws and regulations may be
applicable. The user of this specification is cautioned to contact
state and local environmental and other local regulators to
determine what requirements are appropriate.