Journal ArticleDOI
Performance of Portland cement pastes containing nano-silica and different types of silica
Yemcy Calcina Flores,Yemcy Calcina Flores,Guilherme Chagas Cordeiro,Romildo Dias Toledo Filho,Luís Marcelo Tavares +4 more
TLDR
In this paper, the influence of nano-silica with three different silica-based materials (quartz, ultrafine quartz, and silica fume) on hydration, rheology, porous structure, and compression strength in cement pastes with 2.5% cement replacement.About:
This article is published in Construction and Building Materials.The article was published on 2017-08-15. It has received 78 citations till now. The article focuses on the topics: Silica fume & Portland cement.read more
Citations
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Effects of nano-SiO2 on early strength and microstructure of steam-cured high volume fly ash cement system
Min Liu,Hongbo Tan,Xingyang He +2 more
TL;DR: In this paper, nano-SiO2 (NS) was introduced in a steam-cured cementitious system to induce the early hydration, with intention to promote the early strength.
Journal ArticleDOI
Novel synergy of Si-rich minerals and reactive MgO for stabilisation/solidification of contaminated sediment
Lei Wang,Liang Chen,Dong Wan Cho,Daniel C.W. Tsang,Jian Yang,Deyi Hou,Kitae Baek,Harn Wei Kua,Chi Sun Poon +8 more
TL;DR: Experiments demonstrated that Si-modified MgO cement can transform dredged sediment into fill materials with satisfactory mechanical properties and contaminant immobilisation, and the synergy between reactive MgOs and Si-rich industrial waste is a novel option for sustainable remediation and environmental applications.
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Carbonaceous micro-filler for cement: Effect of particle size and dosage of biochar on fresh and hardened properties of cement mortar
Souradeep Gupta,Harn Wei Kua +1 more
TL;DR: Findings from the study show that finer biochar particles offer superior performance in improving early strength and water tightness compared to normal biochar (with macro-pores), while 28-day properties are similar for mortar with both GBC and NBC respectively.
Journal ArticleDOI
Effect of ferrosilicon and silica fume on mechanical, durability, and microstructure characteristics of ultra high-performance concrete
TL;DR: In this paper , the authors present a new material that can be used as a partial substitute for cement in the production of ultra high performance concrete (UHPC), which is an industrial waste product of ferrosilicon (FS) alloy, available as furnace slag.
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Environmental evaluation, hydration, pore structure, volume deformation and abrasion resistance of low heat Portland (LHP) cement-based materials
TL;DR: In this paper, the abrasion resistance, heat releasing properties, shrinkage behavior and pore structures of LHP cement-based materials are comprehensively investigated, and compared with those of moderate heat Portland (MHP) cement and PC ones.
References
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Influence of nano-SiO2 addition on properties of hardened cement paste as compared with silica fume
TL;DR: In this paper, the influence of nano-SiO 2 (NS) addition on properties of hardened cement paste (hcp) as compared with silica fume (SF) has been studied through measurement of compressive and bond strengths of hcp, and by XRD and SEM analysis.
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Characteristics of cement mortar with nano-SiO2 particles
TL;DR: In this paper, the properties of cement mortars with nano-SiO 2 were experimentally studied, and the results showed that the compressive strength of mortars containing nano SiO 2 particles was significantly higher than those of those containing silica fume at 7 and 28 days.
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Influence of Nucleation Seeding on the Hydration Mechanisms of Tricalcium Silicate and Cement
TL;DR: In this article, the authors investigated the effects of various additives in portland cement and found that a relatively small amount (1−4 wt %) of well-dispersed calcium silicate hydrate (C−S−H), a pure form of the main hydration product, significantly increased both the early hydration rate and the total amount of hydration during the early nucleation and growth period (the first ∼24 h), as measured by calorimetry.
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Accelerating effects of colloidal nano-silica for beneficial calcium–silicate–hydrate formation in cement
TL;DR: In this paper, the role of water in the hydration process of Ca 3 SiO 5 (C 3 S) cement is investigated, and accelerating effects of adding colloidal silica (CS) are established.
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Beneficial role of nanosilica in cement based materials – A review
TL;DR: In this paper, the effects of nanosilica addition on hydration kinetics, microstructure refinement, fresh/hardened properties and durability characteristics of concrete are summarized.