الفهرس 
CHAPTER (1) IntroductionOnly 14 pages are availabe for public view
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Abstract
Ordinary Portland cement (OPC) is by far the most critical component in concrete. The manufacturing of regular OPC is decreasing all over the world in view of the popularity of blended cement on account of lower energy consumption, environmental pollution, economical and other technical reasons. In advanced western countries the production of OPC has become limited to about 40 percent of the total cement production. The main objective of this research was studying the properties of OPC when mixed with fine materials specified as supplementary cementitious materials (SCMs) in order to evaluate the properties of common cement, these materials are silica fume, fly ash, dolomite powder and their combinations. This study accounted for cement pastes and mortars using blended cement (cement + SCMs).
The research included a comprehensive experimental testing to evaluate
the aspects of using blended cements. The experiments were conducted at four ages for cement pastes and mortars 3, 7, 28 and 90 days in order to study the influence of using SCMs with cement on the compressive strength development of pastes and mortars at different ages. The parameters of the study were: w/c ratio, SCMs (silica fume, fly ash, dolomite powder and their combinations: * DP (5-20%)for both cement paste and mortar mixes.
* DP 5% + SF (5, 7%) for cement paste mixes.
* DP (10, 15%) + FA (10, 15%) for cement paste mixes.
* DP (10, 15%) + SF (5,7%) for mortar mixes.
*DP (10, 15%) + FA (10, 15%) for mortar mixes as a replacement of cement.
The thesis is composed of the following chapters :
Chapter (1): Introduction This chapter presents an introduction, research scope and objectives. Also, it gives an overview of the different chapters of the thesis.
Chapter (2): Literature review This chapter summarizes the major findings of recent research related to the properties of mortar and cement paste comprising composite cement.
Chapter (3): Experimental work This chapter describes the materials used, preparation of test specimens for composite cement pastes and mortars and the tests performed on test specimens.
Chapter (4): Analysis of test results This chapter includes a comprehensive analysis to explore the influence of the test parameters on the compressive strength of cement pastes and mortars at different test ages.
Chapter (5): Conclusions Based on the available test results, the main conclusions were summarized in this chapter.