High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete

Çelik, Kemal; Jackson, M.; Mancio, Maurício; Meral, Cagla; Emwas, Abdul‐Hamid; Mehta, PK; Monteiro, P. J. M.

doi:10.1016/j.cemconcomp.2013.09.003

Cited by 236 publications

(89 citation statements)

References 40 publications

(65 reference statements)

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“…About 25 billion metric tonnes are produced globally each year. About 3.3 billion tonnes of PC were used in 2010, mainly for concrete construction projects (Celik et al 2014). Production of Portland cement includes the grinding of raw materials, their calcination at 1500°C, and the grinding of cement clinker with gypsum.…”

Section: Introductionmentioning

confidence: 99%

Fresh Properties of Self-Compacting Concrete Containing Ground Waste Glass Microparticles as Cementing Material

Sharifi

Afshoon

Firoozjaie

2015

ACT

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In this study, the fresh properties of self-compacting concrete (SCC) incorporating ground waste glass (GWG) as cementing material were experimentally investigated. GWG was used as a partial replacement for cement at replacement levels of 0, 5, 10, 15, 20, 25 and 30% by weight. Reducing the consumption of cement in construction is a major issue in terms of economic performance. Such reduction would also contribute to the environment by lessening the harmful impact of the manufacturing process. Concrete mixtures containing different levels of GWG were prepared with the water to cementitious materials ratio of 0.51. The examined properties included workability, wet density, air content and setting time. Workability of the fresh concrete was determined by using the slump flow, visual stability index, V-funnel, J-ring, L-box and GTM screen stability tests. The results indicate that there is a slight decrease in the wet density of self-compacting ground waste glass concrete (SCGWGC) of nearly 1.37% with the increase of GWG content. The conclusion is that using GWG significantly increases the workability of SCC mixtures. As the GWG increases, the slump flow also increases at a constant amount of water and super-plasticizer, but the concrete flow time decreases. The results showed that it is possible to successfully produce SCC with GWG as cement replacement.

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Section: Introductionmentioning

confidence: 99%

Fresh Properties of Self-Compacting Concrete Containing Ground Waste Glass Microparticles as Cementing Material

Sharifi

Afshoon

Firoozjaie

2015

ACT

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“…Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool allowing investigation of the chemical composition of a given sample [14][15][16]. Furthermore, NMR can be used for structural elucidation and to study molecular dynamics [17][18][19][20][21][22].…”

Section: Discussionmentioning

confidence: 99%

The Cytotoxic Effect of Small and Large Molecules of PMF Fraction Extracted from Camel Urine on Cancer Cells

Mahboub

Khorshid

Emwas

2015

BJMMR

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Aim of the work: Animal urine, including that of camels, has long been used for the therapeutic management of human ailments. In this study, we sought to characterize the cytotoxic properties of newly derived purified fractions from previously described camel urine extract (PMF) on various cancer cell lines. Methodology: Two new size dissimilar fractions of PMF (large and small) were obtained by fractionalizing PMF using 3kD and 50kD membrane filters. A SRB cytotoxicity assay of the PMF Mahboub et al.; BJMMR, 6(4): 384-396, 2015; Article no.BJMMR.2015.213 385 fractions was performed on cancer cell lines (A549, HCT116, HepG2, MCF-7, U251 and Hela) as well as normal cell lines (human fibroblast cell line and Vero). Results: This study showed that the newly derived and more purified fraction of PMF (new PMF) possesses effective and selective anti-cancer properties against several types of cancer cell lines. Conclusion: This study, as well as previous ones, suggests that camel urine extracts (old and new PMF) may provide newer therapeutic alternatives to clinically manage cancer patients. However, further studies are needed to verify these positive preliminary results. Original Research Article

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“…After the alkaline activation for the basalt-binder, Figure 7, this hump disappeared after 1 day. Based on the observation, it can be drawn that amorphous phase are highly reactive, whereas plagioclase (labardorite) has moderate reactivity with alkaline solution [39]. There is no appear new crystalline phase as a result of the alkali activation of basalt.…”

Section: The Xrd Analysismentioning

confidence: 99%

Preliminary Study of Alkali Activation of Basalt: Effect of NaOH Concentration on Geopolymerization of Basalt

Saraya¹,

El-Fadaly²

2017

MSCE

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The main objective of this study is to examine the possibility of using fresh basalt powder in the preparation of geopolymer pastes. Four NaOH concentrations of 2.5, 5, 7.5 and 10 M were used to alkali activation of basalt. In addition, effect of curing temperature at ambient, 45˚C and 65˚C were studied. The geopolymer pastes were investigated using FTIR, XRD and SEM-EDS techniques as well as compressive strength up to 90 days. The results were shown the compressive strength of prepared geopolymer increased with concentration of alkali activator up to 90 days. On the other hand, the compressive strength of prepared geopolymer pastes were improved with increased curing temperature. The results showed that there was a change in the chemical and mineral structure, due to the reaction of the sodium hydroxide with the different minerals of the basalt. In addition, the Na/Al and Si/Al ratios were completely different from that of the raw basalt. The geopolymerization reactions occurred at the surface basalt and the unreacted basalt particles actually play a supporting role in the geopolymer properties.

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High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete

Cited by 236 publications

References 40 publications

Fresh Properties of Self-Compacting Concrete Containing Ground Waste Glass Microparticles as Cementing Material

Fresh Properties of Self-Compacting Concrete Containing Ground Waste Glass Microparticles as Cementing Material

The Cytotoxic Effect of Small and Large Molecules of PMF Fraction Extracted from Camel Urine on Cancer Cells

Preliminary Study of Alkali Activation of Basalt: Effect of NaOH Concentration on Geopolymerization of Basalt

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