Supplementary Cementing Materials by Rafat Siddique

By Rafat Siddique

This e-book is an try to consolidate the printed examine regarding using Supplementary Cementing fabrics in cement and urban. It contains of 5 chapters. each one bankruptcy is dedicated to a specific supplementing

cementing fabric. it really is in keeping with the literature/research findings released in

journals/conference continuing, and so on. subject matters coated within the e-book are; coal fly ash, silica fume

(SF), granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA).

Each bankruptcy comprises creation, homes of the waste material/by-product, its potential

usage, and its influence at the homes of unpolluted and hardened concrete and different cement based

materials.

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Extra info for Supplementary Cementing Materials

Sample text

100 9 25 mm discs were made for absorption tests. Samples were subjected to standard fog curing at 23°C ± 2°C and relative humidity of 95 ± 3% for 7 days. Samples were also cured (dry curing) at 23°C ± 2°C and relative humidity of 50 ± 3%. 17. Based on the test results, he concluded that (1) addition of fly ash influenced the sorptivity of the hardened concrete which strongly depended on the curing conditions. When fog cured concretes of identical strengths were considered, sorptivity of fly ash concretes was found to be lower than that of cement concrete.

Raba et al. [101] determined the compressive strength of concrete made with bituminous fly ash (CaO 20%). 9). 22 1 Fly Ash Swamy and Mahmud [117] reported that concrete containing 50% low-calcium bituminous fly ash as partial replacement of cement developed 20–30 MPa compressive strength at 3 days, 60 MPa at the age of 28 days. Joshi et al. [58] tested a large number of fly concrete mixes made by using three different Alberta fly ashes containing about 10% calcium oxide. The replacement level varied between 40 and 60% by weight of cement.

It can be seen from this figure that TC decreased with the increase in fly ash content. For 15 and 30% FA replacement, the reductions were 12 and 23%, respectively, compared to the corresponding control specimens. Demirbog˘a et al. [28] investigated the TCof HVFA concrete at the age of 28 days. Cement was replaced with 0, 50, 60, and 70% of Class C fly ash. They concluded that TC of concrete decreased to 32, 33, and 39% for 50, 60 and 70% fly ash replacement, respectively. 1 Permeability Permeability is the key to the durability of concrete exposed to harsh environments.

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