Effects of elevated temperatures on properties of concrete containing ground granulated blast furnace slag as cementitious material

Li, Qingtao; Li, Zhuguo; Yuan, Guanglin

doi:10.1016/j.conbuildmat.2012.04.103

Cited by 113 publications

(37 citation statements)

References 22 publications

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“…After the temperature was increased up to 800 °C, the relative compressive strengths of OPC + AASA + SF, OPC + AASA + GGBS and OPC + AASA + POFA concretes were approximately 30.2, 33.8 and 32.7 % of the control concrete. It is clear that the compressive strength of concrete decreased significantly when the temperature was raised above 400 °C, as reported in several studies [32,33]. The loss in strength was due to the excessive build-up of vapour pressure, which produced large cracks in the specimens [12].…”

Section: Residual Compressive Strength Of Concrete Subjected To Elevamentioning

confidence: 65%

Elevated Temperature Performance of Multiple-Blended Binder Concretes

Owaid¹,

Hamid²,

Taha³

2016

High Performance Concrete Technology and Applications

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Concretes that contain binary-blended binders (BBB) and ternary-blended binders (TBB) incorporating thermally activated alum sludge ash (AASA), silica fume (SF), ground-granulated blast-furnace slag (GGBS) and palm oil fuel ash (POFA) are exposed to temperatures as high as 800 °C. The water-binder ratio of the multiple-blended binder (MBB) concretes was 0.30, and the total binder and polypropylene (PP) fibre contents were 493 and 1.8 kg/m 3 , respectively. The elevated temperature performance of the MBB concretes is evaluated in terms of the mass loss, compressive strength, ultrasonic pulse velocity (UPV) and surface cracks. The concrete strength deteriorated significantly due to elevated temperature up to 800 °C, but the residual strength of the BBB containing 15 % AASA was higher than that of the control and 20 % AASA concretes. Hightemperature exposure decreased measured UPV values. The concrete weight loss was more pronounced for TBB concretes. The elevated temperature performance of all of the TBB concretes was better than that of the BBB concretes with the same AASA replacement levels. It was observed that PP fibres help reduce spalling. BBB concrete containing 15 % AASA combined with either SF or GGBS or POFA exhibits superior performance at elevated temperature than Portland cement concrete at the same mix design proportion.

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Section: Residual Compressive Strength Of Concrete Subjected To Elevamentioning

confidence: 65%

Elevated Temperature Performance of Multiple-Blended Binder Concretes

Owaid¹,

Hamid²,

Taha³

2016

High Performance Concrete Technology and Applications

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“…This observation also supports the hypothesis as highlighted above. Additionally, recent research has shown that concrete containing supplementary cementing materials such as GGBFS, as is also contained in the RCA, could under-perform in a fire to those that are just of have Portland cement (see [52,53]). …”

Section: Fire Technology 2015mentioning

confidence: 98%

Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs

et al. 2015

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The materials used for the construction of buildings are changing. There are now many sustainability drivers for developing novel green construction materials. An emerging material used for building construction is concrete with conventional coarse aggregates substituted as recycled concrete aggregates (RCA). This is a form of sustainable concrete. A finite number of buildings (>10) with this material have been constructed in North America, Europe and Asia. However; to help facilitate wide spread use and development of sustainable concrete with RCA, there is purpose in considering this material's at-elevated temperature (in-fire) mechanical properties. To date, this topic has seen limited research attention as it is difficult to study. The study herein considered the mechanical properties of conventional and sustainable concrete with RCA. The only difference between the conventional and the sustainable concrete mixes was the mass proportion of a conventional natural coarse aggregate, Limestone, which had been substituted with coarse RCA (at replacement proportions of 0%, 30% and 100%). Both the ambient and elevated temperature mechanical properties were considered with compressive mechanical tests using an innovative optical technology for strain measurement. Based on the analysis performed, a proportional decrease in retained strength and elasticity of concrete at-elevated temperature with increasing RCA content was observed. For example both mechanical properties showed a 0.2% decrease in retained value for every 1% RCA increase at 500°C. In addition the modelling parameter of Poisson ratio appeared to be influenced by the heat imposed and the aggregate type contained within the concrete. For example at 500°C, this parameter showed an 73% increase for concrete samples with only Limestone aggregate and a 15% decrease for samples with only RCA (of mixed origin primarily Siliceous). This paper concludes with highlighting current knowledge gaps and research needs that when addressed could help improve the facilitation of using sustainable concrete's with RCA in construction of buildings.

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“…It was demonstrated that a partial replacement of 50% OPC with a combination of 15% glass powder (GP) and 35% GGPS decreased water absorption of concrete [8]. Under an elevated temperature as high as 700 • C, a loss in compressive strength and mass in concrete made with 100% OPC was comparable to concrete made with up to 50% GGBS [9]. However, under elevated temperatures, an increase in carbonation depth was observed in concrete with GGBS replacement up to 50% compared to control concrete with 100% OPC.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mix Constituents and Curing Conditions on Compressive Strength of Sustainable Self-Consolidating Concrete

Mohamed

2019

Sustainability

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The production of cement requires significant energy and is responsible for more than 5% of global CO2 emissions; therefore it is imperative to reduce the production and use of ordinary portland cement (OPC). This paper examines the compressive strength development of low water-to-binder (w/b) ratio self-consolidating concrete (SCC) in which 90% of the cement is replaced with industrial by-products including ground granulated blast furnace slag (GGBS), fly ash, and silica fume. The emphasis in this paper is on replacing a large volume of cement with GGBS, which represented 10% to 77.5% of the cement replaced. Fresh properties at w/b ratio of 0.27 were examined by estimating the visual stability index (VSI) and t50 time. The compressive strength was determined after 3, 7, 28, and 56 days of curing. The control mix made with 100% OPC developed compressive strength ranging from 55 MPa after three days of curing to 76.75 MPa after 56 days of curing. On average, sustainable SCC containing 10% OPC developed strength ranging from 31 MPa after three days of curing to 56.4 MPa after 56 days of curing. However, the relative percentages of fly ash, silica fume, and GGBS in the 90% binder affect the strength developed as well. In addition, this paper reports the effect of the curing method on the 28 day compressive strength of environmentally friendly SCC in which 90% of the cement is replaced by GGBS, silica fume, and fly ash. The highest compressive strength was achieved in samples that were cured for three days under water, then left to air-dry for 25 days, compared to samples cured using chemical compounds or samples continuously cured under water for 28 days. The study confirms that SCC with 10% OPC and 90% supplementary cementitious composites (GGBS, silica fume, fly ash) can achieve compressive strength sufficient for many practical applications by incorporating high amounts of GGBS. In addition, air-curing of samples in a relatively high temperature (after three days of water curing) produce a higher 28 day compressive strength compared to water curing for 28 days, or membrane curing.

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Effects of elevated temperatures on properties of concrete containing ground granulated blast furnace slag as cementitious material

Cited by 113 publications

References 22 publications

Elevated Temperature Performance of Multiple-Blended Binder Concretes

Elevated Temperature Performance of Multiple-Blended Binder Concretes

Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs

Effect of Mix Constituents and Curing Conditions on Compressive Strength of Sustainable Self-Consolidating Concrete

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