scholarly journals CHANGES IN THE MORPHOLOGY OF HYDRATES WITH POZZOLANIC REACTION BETWEEN HARDENED CEMENT PASTE AND SILICA FUME OR BLAST FURNACE SLAG

2012 ◽  
Vol 66 (1) ◽  
pp. 2-8 ◽  
Author(s):  
Kiyoshi ASAGA
Keyword(s):  
Blast Furnace ◽  
Silica Fume ◽  
Cement Paste ◽  
Blast Furnace Slag ◽  
Pozzolanic Reaction ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Furnace Slag

A Strength Model for Concretes Containing Fly Ash, Blast-Furnace Slag and Silica Fume

1985 ◽  
Vol 65 ◽  
Author(s):  
Edwin R. Dunstan
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Concrete Strength ◽  
Pozzolanic Reaction ◽  
Strength Data ◽  
Production Mechanisms ◽  
Furnace Slag ◽  
By Products

ABSTRACTThis paper describes preliminary a model for the strength of concretes containing industrial by-products such as fly ash, blast-furnace slag, and silica fume. A formula that describes the various strength production mechanisms of these by-products is developed. These materials produce strength by pozzolanic reaction, by latently hydraulic reactions and by self-cementing reactions similar to Portland cement. A method of separating the effect of each mechanism is proposed. A parameter for each of these strength producing mechanisms can be determined from concrete strength data.

scholarly journals Performance Evaluation of Cementitious Composites Containing Granulated Rubber Wastes, Silica Fume, and Blast Furnace Slag

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 632
Author(s):  
Maléki Tagba ◽  
Shujin Li ◽  
Mingjie Jiang ◽  
Xu Gao ◽  
Mohamed Larbi Benmalek ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Microstructural Analysis ◽  
Cementitious Materials ◽  
Pozzolanic Reaction ◽  
Fine Aggregate ◽  
Chloride Resistance ◽  
Accessible Porosity ◽  
Furnace Slag

In this study, rubberized cementitious materials are produced with recycled rubber waste as an alternative to fine aggregate. Mixtures with different additions to rubber wastes (RW), silica fume (SF), and blast furnace slag (BFS) have been designed and characterized. Hardened properties including compressive and bond strength, shrinkage, water-accessible porosity, rapid chloride migration, and microstructure were investigated. The results show that the addition of SF and BFS improves the performances of rubberized mortars and reduces shrinkage. The incorporation of 5% RW with 20% BFS increases compressive strength and reduces water-accessible porosity. Ion chloride resistance was enhanced by a combination of 15% RW, 8% SF, and 20% BFS. The addition of SF and BFS as cement replacement improves the performance of mortars due to their filling effect and a pozzolanic reaction, which has been verified by a microstructural analysis.

Preferential Sorption of Minerals on Calcium Hydroxide of Hydration Productions of Cement

2011 ◽  
Vol 287-290 ◽  
pp. 733-737
Author(s):  
Hong Bo Zhu ◽  
Pei Ming Wang ◽  
Ji Dong Zhang
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Granulated Blast Furnace Slag ◽  
High Calcium ◽  
High Calcium Fly Ash ◽  
Furnace Slag ◽  
Low Activity

Forming progress of hydration productions CH are analyzed in this paper by ways of SEMs of hardened cement paste with or without ground granulated blast furnace slag and high-calcium fly ash. It presents that minerals with latently hydraulic or pozzolanic are apt to absorb CH crystal to grow around it. There are clearly hydraulic reactions in the partial surface of mineral grains connecting with CH crystal and there is little hydration in the part without CH surrounding. It indicates that increasing the absorbability of mineral grain for CH crystal is probably a useful method to advance reactivity of minerals with low activity.

Optimization of Concrete Porous Mix Using Slag as Substitute Material for Cement and Aggregates

2017 ◽  
Vol 865 ◽  
pp. 282-288 ◽  
Author(s):  
Jul Endawati ◽  
Rochaeti ◽  
R. Utami
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Fly Ash ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Environmental Effect ◽  
Substitution Effect ◽  
Main Concern ◽  
Binder Material ◽  
Furnace Slag

In recent years, sustainability and environmental effect of concrete became the main concern. Substituting cement with the other cementitious material without decreasing mechanical properties of a mixture could save energy, reduce greenhouse effect due to mining, calcination and limestone refining. Therefore, some industrial by-products such as fly ash, silica fume, and Ground Iron Blast Furnace Slag (GIBFS) would be used in this study to substitute cement and aggregate. This substitution would be applied on the porous concrete mixture to minimize the environmental effect. Slag performance will be optimized by trying out variations of fly ash, silica fume, and slag as cement substitution material in mortar mixture. The result is narrowed into two types of substitution. First, reviewed from the fly ash substitution effect on binder material, highest compressive strength 16.2 MPa was obtained from mixture composition 6% fly ash, 3% silica fume and 17% grinding granular blast-furnace slag. Second, reviewed from slag types as cement substitution and silica fume substitution, highest compressive strength 15.2 MPa was obtained from mortar specimens with air-cooled blast furnace slag. It composed with binder material 56% Portland composite cement, 15% fly ash, 3% silica fume and 26% air-cooled blast furnace slag. Considering the cement substitution, the latter mixture was chosen.

NMR T1–T2 correlation analysis of molecular absorption inside a hardened cement paste containing silanised silica fume

2018 ◽  
Vol 117 (7-8) ◽  
pp. 1000-1005 ◽  
Author(s):  
Calin Cadar ◽  
Andrea Cretu ◽  
Marioara Moldovan ◽  
Carlos Mattea ◽  
Siegfried Stapf ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Silica Fume ◽  
Cement Paste ◽  
Hardened Cement ◽  
Molecular Absorption ◽  
Hardened Cement Paste

Rheological Properties of Cement Paste Blended Blast Furnace Slag or Fly Ash Powder

2008 ◽  
Vol 45 (6) ◽  
pp. 336-344 ◽  
Author(s):  
Jong-Taek Song ◽  
Hyo-Sang Park ◽  
Seung-Ho Byun ◽  
Dong-Woo Yoo
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Rheological Properties ◽  
Cement Paste ◽  
Blast Furnace Slag ◽  
Furnace Slag
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