Engineered Concrete - Mix Design and Test Methods





INTRODUCTION

The purpose of this book is to familiarize civil engineering and technology students with two of

the most important materials of construction, portland cement (PC) and portland cement concrete

(PCC). People frequently make the mistake of using these terms interchangeably. The book aims

to assist students in gaining an understanding of PC and PCC through the physical handling and

testing of these materials in the laboratory environment. While the book was primarily written for

use at the college level, it also may serve as a practical guide for the graduate engineer and laboratory

technician.



The body of this book is divided into several sections. The first explains how concrete batches

are designed, mixed, and measured for various consistencies in a special section entitled

Mix Design Procedures. Section II details the tests of the primary component materials of concrete other than

water, namely portland cement, aggregates, and mortar. Section III includes some of the fundamental

concrete testing procedures for different strength parameters in conformity with the standards of

the American Society for Testing Materials (ASTM). There probably will never be enough laboratory

time to complete all of the test procedures, even in a 15-week semester.

The testing procedures included herein are intended to accurately reflect the specific ASTM

designations, sometimes with modifications dictated by the inherent time constraints of a school

laboratory. Therefore, in certain cases, such as in securing the specific gravities and absorption of

aggregates, modifications were introduced to fit the usual 3-hour laboratory module. Where the

particular ASTM method permits alternate procedures, only the one deemed more applicable to the

teaching situation was chosen.









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