Fresh and mechanical behavior of a self-compacting concrete with additions of nano-silica, silica fume and ternary mixtures

Bernal, J.; Reyes, E.; Massana, J.; León, Néstor; Sánchez, Evangelina Atanes

doi:10.1016/j.conbuildmat.2017.11.048

Cited by 92 publications

(38 citation statements)

References 30 publications

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“…The combined addition of MS and CS, ternary mixtures, needs higher amount of SP to gain the desired workability. These findings are in agreement with previous studies (Bernal et al 2018;Güneyisi et al 2016). This issue can be due to the high specific surface of MS and CS.…”

Section: Fresh Propertiessupporting

confidence: 94%

“…Many researchers have concentrated on the use of cementitious materials as partial replacements of cement to advance the rheological, mechanical and durability of NWSCC. In fact, to accomplish high-performance self-compacting concrete, it is required to use microscale or nanoscale of mineral admixtures (Bernal et al 2018). In microscale, micro-silica (MS) is a popular pozzolan (Mazloom et al 2004(Mazloom et al , 2015, and nanosilica is the most widely used nanoparticle for producing cement-based materials (Singh et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Few studies have been performed to investigate the properties of NWSCC containing micro-/nano-silica. Bernal et al (2018) studied the effects of micro-and nano-silica as an extra cementitious material, and not as a cement replacement material, on the fresh and mechanical properties of NWSCC. Jalal et al (2015) investigated the effects of some admixtures including fly ash, nano-silica and micro-silica on the behavior of high-performance self-compacting concrete (HPSCC).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the influence of micro- and nano-silica on the behavior of self-compacting lightweight concrete using full factorial design

Afzali-Naniz

Mazloom

2018

Asian J Civ Eng

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The effects of different replacement levels of micro-silica (MS), colloidal nano-silica (CS) and also the combined addition of MS and CS on the behavior of self-compacting lightweight concrete (SCLC) were studied using the general full factorial design method. Three factors, including water to binder ratio (w/b) with two levels of 0.35 and 0.45, CS with four replacement levels of 0, 1, 3 and 5%, and MS with two replacement levels of 0% and 10% were chosen and three tests were conducted for each response. The modulus of elasticity, compressive strength and water absorption were selected as the responses at the age of 28 days. Also, using multiple regression analysis, acceptable prediction regression models were derived. The analysis of variance (ANOVA) showed that the effects of all three factors on fresh and hardened properties of SCLCs were significant. The results displayed that the mentioned properties for the SCLC specimens containing MS or CS improved, but the best performance was obtained in ternary mixes which were created by adding both MS and CS simultaneously. The optimal condition for having the best result of SCLC was obtained when the amounts of MS and CS were 10% and 3%, respectively.

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Section: Fresh Propertiessupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of the influence of micro- and nano-silica on the behavior of self-compacting lightweight concrete using full factorial design

Afzali-Naniz

Mazloom

2018

Asian J Civ Eng

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“…In previous studies, several types of materials with nanoparticles have been used to improve the mechanical properties, durability behavior, and microstructure of cement paste, mortar, and concrete, for example, nano-SiO 2 [16][17][18], nano-TiO 2 [15,19], nano-Al 2 O 3 [20,21], nano-Fe 2 O 3 [21], carbon nanotubes [22], nanoclay [15], and nanolimestone [18]. However, among these nanoparticles, nano-SiO 2 (nanosilica) can be considered as the most frequently used one in improving the performance of concrete [15,17].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Younis

Mustafa

2018

Advances in Materials Science and Engineering

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e aim of this paper was to examine the feasibility of using nanoparticles of SiO 2 (nanosilica) to improve the performance of recycled aggregate concrete (RAC) containing recycled aggregate (RA) derived from processing construction and demolition waste of concrete buildings. e examined properties include compressive strength, splitting tensile strength, and water absorption. e study also includes examining the microstructure of RA and RAC with and without nanoparticles of SiO 2 . In total, nine mixes were investigated. Two mixes with RA contents of 50% and 100% were investigated and for each RA content; three mixes were prepared with three different nanoparticles dosages 0.4%, 0.8%, and 1.2% (by mass of cement). A control mix with natural aggregate (NA) was also prepared for comparison reasons. e results show that nanoparticles of silica can improve the compressive strength, tensile strength, reduce the water absorption, and modify the microstructure of RAC.

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“…e mean particle size of SF can reach about 200 nm, and the specific surface area is large as 20000 m 2 /kg [23,24]. Applying SF in cementitious materials not only brings the benefits as nanomaterials but also decreases the production cost and the environmental impact [22,[25][26][27]. However, as industrial by-products, heavy aggregation commonly exists in SF product, impairing its filling effect and reducing its available active surface area [28,29] so that well-dispersed SF will take advantages efficiently on its reinforcement for cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Well‐Dispersed Silica Fume by Surface Modification and the Control of Cement Hydration

Guo

Sun

et al. 2018

Advances in Civil Engineering

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Silica fume (SF) is a valuable nanoscaled industrial by-product used in cementitious materials owing to its filling and pozzolanic effect. However, the heavy agglomeration of SF is a severe and common problem. In this study, surface modification with polyacrylic acid (PAA) was applied on SF to achieve a better dispersion and to optimize the hydration process of cement at early age. e particle size distribution and surface properties of SF, as well as the cement hydration with modified SF, were investigated. e results demonstrated that the agglomeration of SF particles was efficiently mitigated by the surface treatment with PAA, and the acceleration effect of SF was delayed by the resistance of the surface layer at early age. However, the grafted PAA layer eventually dropped in alkali solution after 6 hours, and the hydration rate was increased again and continued for long time.is work indicated that surface-modified SF was well dispersed and was able to regulate the hydration rate of cement.

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Fresh and mechanical behavior of a self-compacting concrete with additions of nano-silica, silica fume and ternary mixtures

Cited by 92 publications

References 30 publications

Assessment of the influence of micro- and nano-silica on the behavior of self-compacting lightweight concrete using full factorial design

Assessment of the influence of micro- and nano-silica on the behavior of self-compacting lightweight concrete using full factorial design

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Well‐Dispersed Silica Fume by Surface Modification and the Control of Cement Hydration

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Fresh and mechanical behavior of a self-compacting concrete with additions of nano-silica, silica fume and ternary mixtures

Cited by 92 publications

References 30 publications

Assessment of the influence of micro- and nano-silica on the behavior of self-compacting lightweight concrete using full factorial design

Assessment of the influence of micro- and nano-silica on the behavior of self-compacting lightweight concrete using full factorial design

Feasibility of Using Nanoparticles of SiO2 to Improve the Performance of Recycled Aggregate Concrete

Well‐Dispersed Silica Fume by Surface Modification and the Control of Cement Hydration

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Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete