Strength and drying shrinkage properties of self-compacting concretes incorporating multi-system blended mineral admixtures

Güneyisi, Erhan; Gesoğlu, Mehmet; Özbay, Erdoğan

doi:10.1016/j.conbuildmat.2010.04.015

Cited by 185 publications

(68 citation statements)

References 19 publications

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“…In parallel with this, it was also observed that SP demand required increased with the increased the replacement level of CMC in CEM II/B-M and CEM V/A mixes. This is in agreement with the previous studies [15,30,[33][34]50]. The effect of w/c on SP demand was more obvious for CEM V/A mixes compared to CEM II/B-M mixes.…”

Section: 1supporting

confidence: 83%

“…In addition, CEM II/B-M cement mixes for both design strength concretes were observed to provide higher shrinkage development at 7 days. Khatri [52] and Güneyisi [60] stated that inclusion of SF increases the fine pores in the matrix and thereby leads to water loss. This also supports previous studies [15,32,60] that the adverse affect of SF was diminished when it is blended with another CMC in concrete.…”

Section: Flexural Strengthmentioning

confidence: 99%

“…Previous studies [15,22,30] reported FA and GGBS additive ternary blend cement concretes indicated lower shrinkage compared to PC concrete and other ternary blend concretes. Kou [31] stated that increase in the drying shrinkage was proportional to the RA content used.…”

Section: Introductionmentioning

confidence: 99%

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Portland-composite and composite cement concretes made with coarse recycled and recycled glass sand aggregates: Engineering and durability properties

Bostancı

Limbachiya

Kew

2016

Construction and Building Materials

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Sustainable development approach demands the use of environmentally friendly materials. One possible way to encourage sustainable approach is via use of Portland cement (PC) replacement through use of permitted cement constituents in conformity with BS EN 197-1, to lower carbon footprint, and use of recycled aggregates as permitted within BS 8500, to encourage sustainability. Thus, this research study aimed to produce low carbon and sustainable concrete. For this aim, engineering and durability properties of equal 28-day design strength (40 and 50 N/mm 2 ) concretes made with Portland-composite and composite cements, CEM II/B-M and CEM V/A respectively, and partially substituted coarse recycled (RA) and washed recycled glass sand (RGS), 25% and 15% respectively, aggregates was investigated. The loss of workability was found to be larger for particularly CEM V/A and recyled aggregate concrete (RAC) mixes. Studies of hardened concrete properties, comprising bulk engineering properties (compressive cube and cylinder strength, flexural strength, drying shrinkage) and durability (initial surface absorption) showed enhanced performance for CEM II/B-M and CEM V/A mixes of equivalent strength natural aggregate concrete mixes (NAC), except resistance to carbonation. However, the use of CEM II/B-M and CEM V cements in RAC mixes slightly reduced the engineering and durability properties compared to corresponding NAC mixes.Keywords: Carbonation, initial surface absorption, drying shrinkage, fly ash, ground granulated blast-furnace slag, silica fume, recycled glass sand, coarse recycled aggregate Bullet points:Use of CEM II/B-M and CEM V/A cements and coarse recycled aggregates and recycled glass sand in concrete production increased the required superplasticizer demand to achieve the similar consistency.CEM II/B-M cement recycled aggregate concrete mixes indicated either similar or slightly better loss of workability over time compared to corresponding CEM I cement RAC mix.The partial substitution of natural coarse and fine aggregates by 25% coarse recycled and 15% recycled glass sand aggregates reduced the compressive cube strength of concrete approximately by 10%.Recycled aggregates concrete mixes showed dramatically lower compressive cylinder strength results compared to conventional natural aggregate concrete mixes.Drying shrinkage results showed that the contribution of pozzolanic reactions for Portlandslag and composites cement concretes takes place after 14 days.CEM II/B-M cement mixes indicated lower ISAT-10 values as the design strength class increased.Carbonation penetration results showed improvement as the design strength increased for the same cement type concrete mixes.

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Section: 1supporting

confidence: 83%

Section: Flexural Strengthmentioning

confidence: 99%

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Portland-composite and composite cement concretes made with coarse recycled and recycled glass sand aggregates: Engineering and durability properties

Bostancı

Limbachiya

Kew

2016

Construction and Building Materials

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“…In addition to these, Akçaözoğlu [4] stated that use of 50% GGBS replacement in mortar can slightly improve compressive strength at 28 days. Moreover, slightly improved and comparable results were obtained by Güneyisi [8] for 40% and 60% replacement level of GGBS. Studies carried out by Khatri [6] and Berndt [12] with 70% slag replacement in binary blend cement and 65% GGBS with silica fume (SF) in ternary blend cement concretes respectively indicated improved compressive strength at longer ages.…”

Section: Introductionsupporting

confidence: 58%

“…Extensive research carried out on the use of GGBS in combination with PC and other cementitious constituents in concretes indicated that lower early compressive strength due to slower hydration rate of GGBS [2][3][4][5][6][7][8][9][10][11][12]. The lower early strength reported in the existing studies have become more obvious as the replacement levels, on mass basis, increases [2,8]. In addition, Teng [3] and Qiang [13] stated that the difference in early age compressive strength becomes smaller at lower water/cement (w/c) ratios.…”

Section: Introductionmentioning

confidence: 99%

Portland slag and composites cement concretes: engineering and durability properties

Bostancı

Limbachiya

Kew

2016

Journal of Cleaner Production

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The use of different cementitious main constituents is permitted within the BS EN 197-1 for use in concrete construction. The selection of cement types made depends on requirement of enhanced engineering and durability properties of concrete as well as exploiting potential for producing environmentally friendly concretes for practical applications. The main results of a laboratory experimental programme aimed at examining the performance of Portland-slag and composite cement (CEM II/B-S, CEM II/B-M, CEM V/A and CEM V/B) concrete mixes designed for equivalent 28-day compressive cube strengths of 40 and 50 N/mm 2 are reported in paper. The effect of up to 30-50% of ground granulated blast-furnace slag (GGBS) and its' combination with the silica fume (SF) and fly ash (FA) -within the BS EN 197-1 permitted limits-on fresh, engineering and durability properties have been established and its suitability for use in a range of practical applications was assessed.The loss of workability in all mixes was of a uniform nature and was found to be more for CEM V/B concrete mixes. Studies of hardened concrete properties, comprising bulk engineering properties (compressive cube and cylinder strength, flexural strength, drying shrinkage) and durability (initial surface absorption, carbonation rates) showed enhanced performance for Portland-slag and composite cement concrete mixes of equivalent strength, except resistance to carbonation.Keywords: Carbonation, drying shrinkage, durability, fly ash, ground granulated blast-furnace slag, initial surface absorption, mechanical properties, Portland cement, silica fume Bullet points:Lower w/c ratios did not have any influence on minimizing the early strength loss for equivalent 28-day strength concretes.Drying shrinkage results showed that the contribution of pozzolanic reactions for Portlandslag and composites cement concretes takes place after 14 days.Portland-composite cement concretes (PC+GGBS+SF) with higher w/c ratio showed improved pore structure.Carbonation resistance was observed to be linked with the loss of workability over time.

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Compressive strength of efficient self‐compacting concrete with rice husk ash, fly ash, and calcium carbide waste additives using multiple artificial intelligence methods

Mohamed

Bashir

Dirar

et al. 2021

Structural Concrete

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The principal benefit of mixed concrete is to minimize the disadvantages of certain complementary cement ingredients by combining them with other better materials so that overall costs are managed and efficiencies of concrete production are increased. The structural and economic characteristics of concrete can also be improved. In this work, the compressive strength (CS) of selfcompacting concrete (SCC) was assessed and their interrelations were addressed using binary and ternary cementitious combinations of rice husk, fly ash (FA), and calcium carbide. Accordingly, various admixtures were prepared with diverse amounts of wastes by substituting ordinary Portland cement (5%). Thus, due to the raising of rice husk and FA, the CS of SCC was considerably improved. To raise the accuracy of the analysis, three soft computing models of particle swarm optimization (PSO), adaptive neuro-fuzzy inference system (ANFIS), and artificial neural network (ANN) were used. Six input parameters comprising FA replacement ratio, rice husk, total cementitious material, water cement ratio, high ratio water reducing agent and age of samples (AS), and one output parameter as the CS of SCC have been investigated. Subsequently, following the root mean square error and R 2 results, three methods were shown as reliable tools for assessing the influence of cementitious material on CS of self-compact concrete; however, ANFIS remarkably was better than ANN and PSO. As a result, rice husk showed less contribution to the strength of concrete at short times, but much at longer time than FA and calcium carbide. The enhanced influence of low amount of calcium carbide on CS was not significant. Also, it was found that the specimen incorporating of cement with 15% calcium carbide showed better workability than that of normal SCC specimen without calcium. Therefore, rice husk ash showed higher potential to be applied as partial replacements in SCC production.Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.

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Strength and drying shrinkage properties of self-compacting concretes incorporating multi-system blended mineral admixtures

Cited by 185 publications

References 19 publications

Portland-composite and composite cement concretes made with coarse recycled and recycled glass sand aggregates: Engineering and durability properties

Portland-composite and composite cement concretes made with coarse recycled and recycled glass sand aggregates: Engineering and durability properties

Portland slag and composites cement concretes: engineering and durability properties

Compressive strength of efficient self‐compacting concrete with rice husk ash, fly ash, and calcium carbide waste additives using multiple artificial intelligence methods

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