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Standard Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate (C 29/C 29M – 97)

Admin — Tue, 07 Feb 2012 19:52:53 +0000

1.1 This test method covers the determination of bulk density (“unit weight”) of aggregate in a compacted or loose condition, and calculated voids between particles in fine, coarse, or mixed aggregatesbasedon the same determination. This test method is applicable to aggregates not exceeding 5 in. [125 mm] in nominal maximum size.
NOTE 1—Unit weight is the traditional terminology used to describe the property determined by this test method, which is weight per unit volume (more correctly, mass per unit volume or density).

1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard, as appropriate for a specification with which this test method is used. An exception is with regard to sieve sizes and nominal size of aggregate, in which the SI values are the standard as stated in Specification E 11. Within the text, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore each system must be used independently of the other, without combining values in any way.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Specifications for Tolerances for Concrete Construction and Materials and Commentary (ACI 117-06)

Admin — Sat, 28 Jan 2012 11:31:56 +0000

Specification synopsis: This specification provides standard tolerances for concrete construction. This document is intended to be used by specification writers and ACI committees writing standards asthereference document for establishing tolerances for concrete construction.
Commentary synopsis: This report is a commentary on the Specifications for Tolerances for Concrete Construction and Materials (ACI 117). It is intended to be used with ACI 117 for clarity of interpretation and insight into the intent of the committee regarding the application of the tolerances set forth therein.
Keywords: construction; concrete; drilled piers; formwork; foundation; masonry; mass concrete; pier; precast concrete; prestressed concrete; reinforced concrete; reinforcement; specification; splice; tolerances.
Note to Specifier: This Specification is incorporated by reference in the Project Specification using the wording in P3 of the Preface and including information from the Mandatory Requirements and Optional Requirements following the Specification.

PREFACE
P1. ACI Specification 117 is intended to be used by reference or incorporation in its entirety in the Project Specification. Do
not copy individual Parts, Sections, Articles, or Paragraphs into the Project Specification because taking them out of context
may change their meaning.
P2. If Sections or Parts of ACI Specification 117 are copied into the Project Specification or any other document, do not refer
to them as an ACI Specification because the specification has been altered.
P3. A statement such as the following will serve to make ACI Specification 117 a part of the Project Specification: “Work on
(Project Title) shall conform to all requirements of ACI 117-06 published by the American Concrete Institute, Farmington
Hills, Michigan, except as modified by these Contract Documents.”
P4. The language in each technical Section of ACI Specification 117 is imperative and terse.

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Preparation of Notation for Concrete (ACI 104-71)

Admin — Fri, 27 Jan 2012 22:00:50 +0000

ACI Standard
Preparation of Notation for Concrete (ACI 104-71)
(Revised 1982) Reapproved 1997
Reported by ACI Committee 104 *

Indicates how symbols shall be selected to represent quantities or terms.Principalsymbols are upper and lower case Roman letters and Greek lower case letters. Roman lower case letters are used as subscripts and Greek upper case letters are reserved for mathematics.
Keywords: coding; concretes; definitions; nomenclature; notation; prestressed concrete; reinforced concrete; structural analysis; structural design; symbols; terminology.
PREPARATION OF NOTATION:

Scope:
All symbols used in defining any aspect of concrete construction shall be prepared using the guide outlined in Table 1.

Construction of symbols:
The preparation of a symbol to represent a given quantity shall be conducted in the following manner.
(a) The leading or main letter of the symbol shall be selected from Table 1 based on …..

Download ACI 104-71 (Preparation of Notation for Concrete) to read more