Natural pozzolana and its uses in concrete

Dissertant

al-Doori, Saba Qays Ibrahim

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Ph.D.

Degree Date

2000

English Abstract

Natural pozzolan has been in use for many centuries.

When mixed with lime, they have provided cement for long lasting and spectacular construction.

Since the mid-sixties, utilization in the USA and elsewhere has been overshadowed by the increasing popularity of fly ash, mainly due to cost.

Many developing countries, however, have turned to pozzolan, when available, to supplement of ten insufficient Portland cement supplies.

This research review the types and behavior of natural pozzolan, the behavior of hydrated cement, the Portland cement pozzolan-water reaction and the relationship between the lime- pozzolan reaction and the mechanical properties of the cement.

It is recognized "that the reaction is "Influenced by the" chemical and mineral composition of both the pozzolan and the-element, their relative finesses, conditions of" admixtures"Many of literature indicate that most elements of modern concrete technology, and in particular, the use of chemical admixtures and polymer impregnation, have included portioned-pozzolan cements in their scope.

Apart from reducing cost, compared to plain Portland cement concrete, the benefits of Portland-pozzolan blends are essentially associated with improvements in durability, reducing permeability and in particular, resistance to sulfate attack and a reduction in the effects of the alkali-aggregate reaction.

This research concludes by indicating some of the factors involved in developing natural.

Main Subjects

Civil Engineering

Topics

• Concrete

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-306245