ACI PRC-211.7-20: Guide for Proportioning Concrete Mixtures with Ground Calcium Carbonate and Other Mineral Fillers

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Description

The use of ground calcium carbonate (GCC) and other mineral fillers can enhance the performance, economy, and sustainability of concrete mixtures. Modifications to the conventional proportioning method in ACI 211.1 are needed to incorporate these materials. This guide describes GCC and dust-of-fracture aggregate mineral fillers, including their properties, characterization, and qualification, and effects on concrete properties and sustainability. Recommendations are provided for proportioning concrete mixtures with these materials.

Keywords:

aggregate mineral filler; dust-of-fracture; ground calcium carbonate; ground lime

 

Document Details

Author: ACI Committee 211

Pages: 16

ISBN: 9781641951227

Categories: Aggregates, Materials

Formats: Protected PDF/Web View

Table of Contents

CHAPTER 1—INTRODUCTION, p. 2

CHAPTER 2—DEFINITIONS, p. 3

CHAPTER 3—CONSTITUENT MATERIALS, p. 3

3.1—Introduction, p. 3

3.2—Ground calcium carbonate, p. 3

3.3—Dust-of-fracture aggregate mineral filler, p. 3

CHAPTER 4—GROUND CALCIUM CARBONATE AND AGGREGATE MINERAL FILLER CHARACTERIZATION AND QUALIFICATION, p. 3

4.1—Introduction, p. 3

4.2—Morphology (shape, angularity, and texture), p. 3

4.3—Mineralogy, p. 4

4.4—Particle size and particle size distribution, p. 5

4.5—Deleterious materials, p. 5

4.6—Relative density (specific gravity), p. 6

CHAPTER 5—EFFECTS ON CONCRETE PROPERTIES, p. 6

5.1—Rheology and workability, p. 6

5.2—Placement and finishing characteristics, p. 6

5.3—Strength, p. 7

5.4—Setting time, p. 7

5.5—Durability, p. 7

CHAPTER 6—PROPORTIONING METHODS, p. 9

6.1—Basic relationships, p. 9

6.2—Modified ACI 211.1 method for ground calcium carbonate, p. 10

6.3—Modified ACI 211.1 method for dust-of-fracture aggregate mineral fillers, p. 10

CHAPTER 7—SAMPLE COMPUTATIONS, p. 12

7.1—Wet aggregate mineral filler in manufactured sand, p. 12

7.2—Dry aggregate mineral filler, p. 13

7.3—Adjustment of trial batches, p. 14

CHAPTER 8—SUSTAINABILITY, p. 14

8.1—Ground calcium carbonate, p. 14

8.2—Dust-of-fracture aggregate mineral fillers, p. 14

CHAPTER 9—REFERENCES, p. 14

Authored documents, p. 15

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