A comprehensive comparison between using silica fume in the forms of water slurry or blended cement in mortar/concrete

ABSTRACTThe hydration of a blended cement through hydraulic or pozzolanic reactions results in heterogeneous polyphase materials. Because portland cement clinker is the major component in most cement blends, the microstructural development of portland cement hydrates, including C-S-H and pore structures, is first discussed. Slag, fly ash, silica fume and limestone filler cements are then compared to portland cement with regards to C-S-H morphology and composition, aluminate crystallization, cement paste interfaces and pore size distribution.

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Influence of graphene nanoplatelets on morphological and electrical properties of silica fume blended cement – Piezoelectric ceramic composite

Ceramics International ◽

10.1016/j.ceramint.2018.08.131 ◽

2018 ◽

Vol 44 ◽

pp. S137-S140 ◽

Cited By ~ 2

Author(s):

Nittaya Jaitanong ◽

Suparut Narksitipan ◽

Athipong Ngamjarurojana ◽

Arnon Chaipanich

Keyword(s):

Electrical Properties ◽

Silica Fume ◽

Piezoelectric Ceramic ◽

Ceramic Composite ◽

Blended Cement ◽

Graphene Nanoplatelets

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Simulation of silica fume blended cement hydration

Materials and Structures ◽

10.1007/bf02479636 ◽

2004 ◽

Vol 37 (6) ◽

pp. 397-404 ◽

Cited By ~ 11

Author(s):

J. Yajun ◽

J. H. Cahyadi

Keyword(s):

Silica Fume ◽

Cement Hydration ◽

Blended Cement

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Shrinkage of Blended Cement Pastes with Mineral Additions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.539.55 ◽

2013 ◽

Vol 539 ◽

pp. 55-59

Author(s):

Yi Chen ◽

Wu Yao ◽

Dan Jin

Keyword(s):

Fly Ash ◽

Silica Fume ◽

Cement Paste ◽

Mercury Intrusion Porosimetry ◽

Construction Materials ◽

Blended Cement ◽

Cement Pastes ◽

Mercury Intrusion ◽

Mineral Additions ◽

By Products

Mineral additions such as fly ash and silica fume are industrial by products, and play an important role in properties improvement for construction materials. In this work, the shrinkage of cement paste blended with fly ash and silica fume by different substitute ratio was studied. Pore structures of specimens at different ages were determined by mercury intrusion porosimetry (MIP) and shrinkage deformation was measured by standard shrinkage tests. The effects of mineral addtions on shrinkage were discussed. The results show that the fly ash was significantly effective on shrinkage at early ages. Based on the research, several suitable advices were offered to optimize the performances of materials and reduce the shrinkage.

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Effects of Limestone Powder and Silica Fume on the Hydration and Pozzolanic Reaction of High-Strength High-Volume GGBFS Blended Cement Mortars

Journal of the Korea Concrete Institute ◽

10.4334/jkci.2015.27.2.127 ◽

2015 ◽

Vol 27 (2) ◽

pp. 127-136 ◽

Cited By ~ 4

Author(s):

Ji-Yong Jeong ◽

Seung-Yup Jang ◽

Young-Cheol Choi ◽

Sang-Hwa Jung ◽

Sung-Il Kim

Keyword(s):

Silica Fume ◽

Blended Cement ◽

High Strength ◽

High Volume ◽

Pozzolanic Reaction ◽

Limestone Powder ◽

Cement Mortars

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The Change of Silica Tetrahedron in Cement-Silica Fume Blends Hydration

Materials Science Forum ◽

10.4028/www.scientific.net/msf.743-744.280 ◽

2013 ◽

Vol 743-744 ◽

pp. 280-284

Author(s):

Xiao Jun Wang ◽

Xiao Yao Wang ◽

Hong Fei Zhu ◽

Xiao Ye Cong

Keyword(s):

Portland Cement ◽

Silica Fume ◽

Stable State ◽

Blended Cement ◽

Hydration Product ◽

Pozzolanic Reaction ◽

Magic Angle Spinning ◽

Magic Angle ◽

Strength Increase ◽

Angle Spinning

The change of silica tetrahedron in cement-silica fume blends hydration is critical for blended cement application. 29Si solid-state magic angle spinning nuclear magnetic resonance (MAS NMR) investigations on the change of silica tetrahedron, which were Portland cement hydration, silica fume in simulated hydration and cement-silica fume blends hydration, were characterized and compared in this paper. The experimental results revealed that the amorphous silica tetrahedron structure in silica fume changed into Q1 and Q2 silica tetrahedrons, the same as silica-oxide structure of cohesive gel in the hydration of Portland cement. The coexistence of Q1 and Q2 silica tetrahedron in hydration product was beneficial to the strength increase of blend paste with silica fume. The amount of Q2 silica tetrahedron in cement-silica fume blends was higher than that in Portland cement. The pozzolanic reaction of silica fume accelerated the course of the silica tetrahedron in blended paste turning into the stable state of Q2 silica tetrahedron and existing principally in blended paste. That is reason that the physical properties of cement-silica fume blends are better than those of Portland cement.

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