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Title: 232.1R-00: Use of Raw or Processed Natural Pozzolans in Concrete (Reapproved 2006)
Year of Publication: 2000
Number of Pages: 24
This document is: Active
Nonmember Price: $33.50
ACI Member Price: $19.00
Order Code: 232100
Abstract: The report provides a review of the state-of-the-art use of raw or processed natural pozzolans in concrete and an overview of the properties of natural pozzolans and their proper use In the production of hydraulic-cement concrete. Natural pozzolans mixed with lime were used in concrete construction long before the invention of portland cement because of their contribution to the strength of concrete and mortar. Today, natural pozzolans are used with portland cement not only for strength, but also for economy and beneficial modification of certain properties of fresh and hardened portland-cement concrete This report contains information and recommendations concerning the selection and use of natural pozzolans generally conforming to the applicable requirments of ASTM C 618 and CSA A23.5. Topics covered include the effect of natural pozzolans on concrete properties, a discussion of quality assurance, and guidance regarding handling and use of natural pozzolans in specific applications. References are provided that offer more information on each topic Keywords: alkali-silica reaction; cement; concrete; concrete strength; diatomaceous earth; lime; natural pozzolan; pozzolan; pozzolanic activity; sulfate attack (on concrete)
Contents: Chapter 1--General 1.1--History 1.2--Definition of a natural pozzolan 1.3--Chemical and mineralogical composition 1.4--Classification 1.5--Examples 1.6--Chemical and physical properties 1.7--Uses Chapter 2--Effects of natural pozzolan on concrete properties 2.1--Concrete mixture proportions 2.2--Porperties of fresh concrete 2.3--Properties of hardened concrete Chapter 3--Specifications, test methods, quality control, and quality assurance 3.1--Introduction 3.2--Chemical requirements 3.3--Physical requirements 3.4--General specification provisions 3.5--Methods of sampling and testing 3.6--Quality control and quality assurance Chapter 4--Concrete production using natural pozzolans 4.1--Storage 4.2--Batching Chapter 5--Concrete applications for natural pozzolans 5.1--Concrete masonry units 5.2--Concrete pipes 5.3--Prestressed concrete products 5.4--Mass concrete Chapter 6--Other uses of natural pozzolans 6.1--Grouts and mortars 6.2--Controlled low-strength materials Chapter 7--References 7.1--Referenced standards and reports 7.2--Cited references
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