The mix design for self-compacting high performance concrete containing various mineral admixtures

Le, Ha Thanh; Müller, Matthias; Siewert, Karsten; Ludwig, Horst‐Michael

doi:10.1016/j.matdes.2015.01.006

Cited by 96 publications

(45 citation statements)

References 24 publications

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“…5 shows the residual compressive strength and relative residual compressive strength of sacrificial concrete at elevated temperatures that is defined as the ratio of residual compressive strength at elevated temperature to compressive strength at ambient temperature. As seen in Fig.5a, the compressive strength of sacrificial concrete decreased monotonically with the increase of temperature, which is consistent with the change of compressive strength of self-consolidating concrete [31,44,45] and siliceous sacrificial concrete [36] exposed to elevated temperatures. The compressive strength loss can be attributed to the increase in porosity of sacrificial concrete over the same range of temperature (see Fig.4a) and to the decrease in both stiffness and cohesive strength of C-S-H gel [46].…”

Section: Residual Compressive Strengthsupporting

confidence: 83%

Mechanical and thermal properties of graphene sulfonate nanosheet reinforced sacrificial concrete at elevated temperatures

Chu

Sun

Zhang

2017

Construction and Building Materials

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Progress in the field of nanomaterials presents an opportunity to improve the performance of cementitious composites via graphene or its derivatives. This paper presents an experimental study on mechanical and thermal properties of sacrificial concrete without and with graphene sulfonate nanosheets (GSNSs) during high temperature exposure. The microstructure, porosity, mechanical strengths, thermal analysis, coefficient of thermal expansion, thermal diffusivity and ablation behaviour of sacrificial concrete during exposure to various temperatures up to 1000 ºC were comprehensively investigated. Two new experimental apparatuses were developed and used to measure mechanical strengths of sacrificial concrete at elevated temperatures. It was found that the compressive strength, splitting tensile strength, thermal diffusivity and decomposition enthalpy of sacrificial concrete were increased by 12. 98-25.36%, 8.66-34.38%, 25.00-103.23% and 4.23% respectively when adding 0.1 wt% GSNSs, while the porosity and ablation velocity of sacrificial concrete were reduced by 3.01-6.99% and 4.14% respectively due to the incorporation of GSNSs.

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Section: Residual Compressive Strengthsupporting

confidence: 83%

Mechanical and thermal properties of graphene sulfonate nanosheet reinforced sacrificial concrete at elevated temperatures

Chu

Sun

Zhang

2017

Construction and Building Materials

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“…To clarify the e ciency of SCMs on compressive strength, the e ect of FA + SF can be expressed as an eciency factor (k-value) [15][16][17]. A k-value approaching one means that the addition is equivalent to cement.…”

Section: Compressive Strengthmentioning

confidence: 99%

“…To evaluate the possibility of predicting the compressive strength of UHPCs incorporating SCMs, namely, FA and SF, an ANN model was constructed using 78 groups of experimental data from 11 literature sources [5,15,[21][22][23][24][25][26][27][28][29], including the results from this work. Table 4 details the data sources and variables.…”

Section: Fundamental Data Collectionmentioning

confidence: 99%

Experimental Investigation and Prediction of Compressive Strength of Ultra-High Performance Concrete Containing Supplementary Cementitious Materials

Zhang

Zhao

2017

Advances in Materials Science and Engineering

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Ultra-high performance concrete (UHPC) has superior mechanical properties and durability to normal strength concrete. However, the high amount of cement, high environmental impact, and initial cost are regarded as disadvantages, restricting its wider application. Incorporation of supplementary cementitious materials (SCMs) in UHPC is an e ective way to reduce the amount of cement needed while contributing to the sustainability and cost. is paper investigates the mechanical properties and microstructure of UHPC containing y ash (FA) and silica fume (SF) with the aim of contributing to this issue. e results indicate that, on the basis of 30% FA replacement, the incorporation of 10% and 20% SF showed equivalent or higher mechanical properties compared to the reference samples. e microstructure and pore volume of the UHPCs were also examined. Furthermore, to minimise the experimental workload of future studies, a prediction model is developed to predict the compressive strength of the UHPC using arti cial neural networks (ANNs). e results indicate that the developed ANN model has high accuracy and can be used for the prediction of the compressive strength of UHPC with these SCMs.

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“…The constant parameters of the compositions were the binder content (550 kg/m 3 ) and the water/binder ratio (0.32). The compositions of the mixes were developed based on the authors' own experiences and the work guidelines by Le et al (2015). The characteristic properties of the concrete mixes are given in Table 1 and their mechanical properties in Ta Table 2.…”

Section: Materials and Concrete Mixturesmentioning

confidence: 99%

“…To obtain the desired properties, it is necessary to select appropriate components. In comparison to ordinary concretes, the designing process of HPSCC mixtures is determined by an increased Portland cement content, new generation superplasticizers and an additive of a reactive mineral material in the form of silica fume (Gesoğlu et al 2009;Le et al 2015;Jalal et al 2015) Numerous publications concerning self-compacting concrete (Valcuende et al 2005;Domone 2007;de Schutter et al 2008) have concluded that the mechanical properties of solidified SCCs depend mainly on their microstructures. It has also been demonstrated that the relation between the concrete's microstructure and its mechanical properties does not depend directly on the method of mix compaction applied.…”

Section: Introductionmentioning

confidence: 99%

The Top-Bar Effect in Specimens with a Single Casting Point at One Edge in High-Performance Self-Compacting Concrete

Dybeł

Wałach

Ostrowski

2018

ACT

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An investigation of the steel-to-concrete bond in high-performance self-compacting concrete (HPSCC) is presented based on direct pull-out tests. The investigation was performed on specimens made of three different HPSCC mixes with varying contents of silica fume (without, 5 and 10% by mass of cement). Specifically, the top-bar effect in specimens with a single casting point at one edge was examined. Horizontal specimens with transverse rebars distributed over their heights (480 mm) and lengths (1600 mm) were cast. The bond capacity of the HPSCC was decreased across the length up to the measured rebar distance from the casting point. The reduction occurred with the same magnitude in both the lower and upper section of the horizontal specimens. It was found that the top-bar effect did not change significantly with an increasing distance of the rebars from the casting point of the concrete mixture. It was demonstrated that the modification of the HPSCC using the silica fume significantly improved the quality of the bond conditions.

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The mix design for self-compacting high performance concrete containing various mineral admixtures

Cited by 96 publications

References 24 publications

Mechanical and thermal properties of graphene sulfonate nanosheet reinforced sacrificial concrete at elevated temperatures

Mechanical and thermal properties of graphene sulfonate nanosheet reinforced sacrificial concrete at elevated temperatures

Experimental Investigation and Prediction of Compressive Strength of Ultra-High Performance Concrete Containing Supplementary Cementitious Materials

The Top-Bar Effect in Specimens with a Single Casting Point at One Edge in High-Performance Self-Compacting Concrete

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