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Aggregates for Concrete 6 1—Introduction to lightweight aggregates 6 2—Definition of lightweight-aggregate concrete 6 3—Low-density concretes and associated aggregates 6 3 1—Structural lightweight concrete and associated aggregates 6 3 2—Moderate-strength lightweight concrete and associated aggregates 6 3 3—Properties Chapter 7—Recycled aggregates, p E1-23
topicdetail - American Concrete Institute The American Concrete Institute (ACI) is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete
What is aggregate? - American Concrete Institute What is aggregate? A What is aggregate? A Aggregate is granular material, such as sand, gravel, crushed stone, crushed hydraulic cement concrete, or air-cooled iron blast-furnace slag, used with hydraulic cement to produce either concrete or mortar
Alkali-Aggregate Reactivity - American Concrete Institute 5 3 Evaluating Aggregates for Potential Alkali-Aggregate Reactivity 5 3 1 Field Performance 5 3 2 Petrographic Examination 5 3 3 Laboratory Tests to Identify Alkali-Silica Reactive Aggregates 5 3 3 1 Mortar-Bar Test (ASTM C227) 5 3 3 2 Quick Chemical Test (ASTM C289) 5 3 3 3 Accelerated Mortar Bar Test (ASTM C1260)
Aggregate classification by density - American Concrete Institute Yes Those used to make normal-density concrete are called normal-density aggregates Those for low-density concrete (historically known as “lightweight” concrete) that have an air-dried density at 28 days usually in the range of 1440 to 1850 kg m 3 (90 to 115 lb ft 3), are called low-density aggregates
E-1(16) Aggregates for Concrete - American Concrete Institute CHAPTER 4—SAMPLING AGGREGATES 4 1—Variability in aggregates 4 2—Sampling CHAPTER 5—BLAST-FURNACE SLAG AND LIGHTWEIGHT AGGREGATES 5 1—Blast-furnace slag 5 2—Lightweight aggregates 5 3—Recycled aggregates CHAPTER 6—REFERENCES ERRATA INFO Any applicable errata are included with individual documents at the time of purchase
Characteristics of Lightweight Aggregates for High-Strength Concrete In this paper, an investigation of some high-strength lightweight aggregates available on the European market is reported For the various aggregates, particle shape, surface texture, and pore structure varied within wide limits Most of the pores in the aggregate were open, and thus susceptible to water absorption
Requirements for storing and handling aggregate A third problem is the maintenance of uniform and stable moisture content in the aggregates as batched (ACI 304R, ACI 221R) A practical method of reducing segregation to a minimum in coarse aggregate is to separate the material into several size fractions and batch these fractions separately
aggregate Topic - American Concrete Institute Aggregates are the major constituent (ingredient) in concrete, making up 60% to 70% of the volume of concrete Aggregates influence the workability of plastic concrete and also the durability, strength, thermal properties, and density of hardened concrete Particle size divides aggregates into two categories: fine and coarse