Ternary blended cement: An eco-friendly alternative to improve resistivity of high-performance self-consolidating concrete against elevated temperature

AzariJafari, Hessam; Amiri, Mohammad Javad Taheri; Ashrafian, Ali; Rasekh, Haleh; Barforooshi, Maedeh Javaheri; Berenjian, Javad

doi:10.1016/j.jclepro.2019.03.054

Cited by 89 publications

(40 citation statements)

References 61 publications

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“…For further investigation, the present study is an effort to assess the effect of SF and PF at various volume contents on the mechanical properties of concrete incorporating LECA with W/B ratios of 0.37 and 0.42 at 3, 7, 28 and 60 days. Since the curing regime and age can affect the mechanical properties of concrete materials [50][51][52][53][54][55] and wet curing condition appear to be highly effective in improving the compressive strength of fibre reinforced concrete (FRC) and LC [56,57], cubic and cylindrical specimens were cured under six curing conditions: wet, 3-day wet, 14-day wet, air-dry controlled, air-dry uncontrolled, and 90 °C vapour. Therefore, the concrete specimens were cured by immersion in a water tank and taken out after different ages; then, the results of these specimens were compared with those cured under 90 °C vapour curing condition.…”

Section: Concrete Is One Of Most Popular Construction Materials and Imentioning

confidence: 99%

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Madandoust

Kazemi

Talebi

et al. 2019

Construction and Building Materials

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This study assessed the effect of steel and polypropylene fibres at various volume contents on concrete incorporating lightweight expanded clay aggregate (LECA) and water/binder (W/B) ratios of 0.37 and 0.42. The concrete specimens were cured under six curing conditions: wet, 3-day wet, 14-day wet, air-dry controlled, air-dry uncontrolled, and 90 °C vapour. The use of lightweight aggregates in the construction industry has drawn the attention of researchers and, on the other hand, fibres with a high strain-hardening response can be used as an appropriate addition in concrete materials. In this study, the mechanical properties of lightweight concrete containing steel or polypropylene fibres were evaluated by means of compressive strength, splitting tensile strength and modulus of elasticity tests at 3, 7, 28 and 60 days. According to the results, fibre reinforced concrete mixes containing LECA, cured under 90 °C vapour curing, achieved the highest mechanical strength. In addition, the optimum contents of steel fibres to obtain the highest compressive and splitting tensile strengths of lightweight concrete were 1% and 3%, respectively.

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Section: Concrete Is One Of Most Popular Construction Materials and Imentioning

confidence: 99%

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Madandoust

Kazemi

Talebi

et al. 2019

Construction and Building Materials

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“…In addition, cubic specimens were cast and prepared and tested with the Schmidt rebound hammer at 11, 28, 42 and 90 days. Since the curing regimes can affect the mechanical properties of concrete materials [34][35][36][37], plain concrete slabs and cubic specimens were cured under both wet and dry conditions. The results of Schmidt rebound hammer and core testing were compared with those of standard cube tests.…”

Section: Introductionmentioning

confidence: 99%

Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing

Kazemi

Madandoust

Brito

2019

Construction and Building Materials

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The main objective of this study was to estimate the compressive strength of recycled aggregate concrete (RAC) by means of Schmidt rebound hammer and core testing. The use of recycled aggregate in concrete has been shown to lead to a decrease in the construction cost and it can reduce the burden on the environment by saving natural aggregates. On the other hand, some nondestructive and semi-destructive techniques, such as Schmidt rebound hammer and core testing, are long-established methods for strength estimation of materials. Thus, the present study intended to obtain the compressive strength of RAC using these methods and then compare it with the results of 150 mm cube specimens. To achieve this goal, after producing concrete mixes with 70% replacement of recycled coarse aggregate, 96 cube specimens and 8 concrete slabs were cast to perform Schmidt rebound hammer, core and cube testing. In addition, the combination of the methods was used to obtain correlations between Schmidt rebound hammer and core testing. The results demonstrate that a multi-variable equation using these tests' results can efficiently predict the compressive strength of RAC and conventional concrete and is more promising than single-variable equations based on the Schmidt rebound hammer test results.

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“…It is known that micro cracks in the cement paste and aggregates begin to spread between 450-600 ºC. Thus, the UPV results showed a decrease of more than 50% (AzariJafari et al, 2019). The minimum UPV decrease at 700°C was observed in the water cooled A concrete mixture as 64.89%, while the maximum UPV decrease was observed in the water cooled PA concrete mixture as 73.28% at 700 ºC.…”

Section: Water Absorption Capacitiesmentioning

confidence: 95%

Effects of plasticizer and antifreeze on concrete at elevated temperatures and different cooling regimes

Kara

Arslan

2020

rdlc

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In recent years, chemical admixtures have become one of the main components of concrete alongside aggregate, cement and water. In this study, the plasticizer and the antifreeze were used. The concrete specimens (the reference concrete without an admixture, concrete with plasticizer, concrete with antifreeze and concrete with plasticizer+antifreeze) were exposed to elevated temperatures (200, 400, 550 and 700 ºC) and cooling via air and water. Water absorption, ultrasonic pulse velocity and compressive strength tests were performed on the specimens. The concrete specimens were also analyzed using X-ray diffraction. The test results indicated that at the temperatures of 550 and 700 ºC and against both of the cooling regimes the plasticizer+antifreeze concrete showed a maximum strength loss. When the air cooled specimens were examined, the lowest strength loss was this obtained for reference concrete at 550 and 700 ºC. The lowest strength loss at these temperatures for the water cooled specimens was observed in the concrete with antifreeze. After being exposed to 700 ºC and the cooling regimes, no portlandite peaks were observed in the concrete mixtures was when they were compared at with the control specimen exposed to 20 ºC in the X-ray diffraction analysis.

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Ternary blended cement: An eco-friendly alternative to improve resistivity of high-performance self-consolidating concrete against elevated temperature

Cited by 89 publications

References 61 publications

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing

Effects of plasticizer and antifreeze on concrete at elevated temperatures and different cooling regimes

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