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Title: 304.6R-09 Guide for Use of Volumetric-Measuring and Continuous-Mixing Concrete Equipment
Author: ACI Committee 304
Year of Publication: 2009
Number of Pages: 18
This document is: Active
Nonmember Price: $47.50
ACI Member Price: $29.00
Order Code: 304609
Abstract: Click here to view the first few pages of this publication - pdf file format
This guide includes a short history of and information on the basic design and operation of equipment, frequently called mobile mixers, used to produce concrete by volumetric measurement and continuous mixing (VMCM). Definitions, applications, and quality assurance testing are discussed. The use of this equipment is compared with weigh-batch-mixing equipment to highlight some of the limited differences. Keywords: batcher; continuous mixer; flowing (self-consolidating) concrete; fresh concrete; grout; high-early-strength concrete; latex; mixer; no-fines (pervious) concrete; overlay; precast concrete; shotcrete.
Contents: Chapter 1—Introduction and scope, p. 304.6R-2 1.1—Introduction 1.2—Scope 1.3—History Chapter 2—Definitions, p. 304.6R-2 Chapter 3—Equipment, p. 304.6R-2 3.1—Materials storage and measurement 3.2—Mixers 3.3—Equipment condition Chapter 4—Operations, p. 304.6R-3 4.1—General 4.2—Production rates 4.3—Planning 4.4—Materials 4.5—Personnel qualifications Chapter 5—Applications, p. 304.6R-4 5.1—General 5.2—Mixtures with short working times 5.3—Low-slump mixtures 5.4—Latex-modified overlays 5.5—Long unloading times 5.6—Concrete at remote sites 5.7—Making small deliveries 5.8—Precast operations 5.9—Hot weather concreting 5.10—Mining applications 5.11—Grouting and pile filling 5.12—Colored concretes 5.13—Emergency applications 5.14—Controlled low-strength fill 5.15—Fiber-reinforced concrete 5.16—Military applications Chapter 6—Quality control and testing, p. 304.6R-7 6.1—General 6.2—Calibration 6.3—Production testing Chapter 7—Operational precautions, p. 304.6R-9 7.1—General 7.2—Cold weather concrete 7.3—Hot weather concrete 7.4—Aggregate moisture 7.5—Rapid slump loss due to false set 7.6—Use of admixtures 7.7—Freshly mixed concrete properties Chapter 8—References, p. 304.6R-9 8.1—Referenced standards and reports Appendix A—Sample calibration procedure/forms, p. 304.6R-11
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