On the hygrothermal behavior of concrete containing glass powder and silica fume

Boukhelf, Fouad; Cherif, Rachid; Trabelsi, Abdelkrim; Belarbi, Rafik; Bouiadjra, Mohamed Bachir

doi:10.1016/j.jclepro.2021.128647

Cited by 28 publications

(22 citation statements)

References 71 publications

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“…This gap is more important for the concrete. The latter has a water vapor permeability of 9.51 × 10 −13 kg•m −1 •s• −1 •Pa −1[61]. We can deduce that necessary vapor flux through cob specimens is more important than for concrete specimens.…”

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confidence: 86%

Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior

et al. 2022

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Raw earth is one of the oldest building materials of mankind. Almost a third of the world’s population is living in an earth-based house. However, their use remains low compared to conventional materials such as concrete, steel, and wood. Although these geosourced materials are abundant, recyclable, and have a low environmental footprint, their use is very limited in the construction sector. This can be explained by the lack of data regarding their hygrothermal behavior. In this context, the present work aims to highlight the properties of cob construction material with straw addition. An experimental characterization of hygrothermal and microstructural properties has been carried out. Thermal conductivity, specific heat, sorption isotherms, moisture storage capacity, moisture buffer value (MBV), and water vapor permeability are obtained experimentally. Then, the collected data are used as input parameters of a numerical prediction model to numerically assess the thermal and hygric behavior. Cob is then compared to other more commonly used materials to highlight the benefits of its use within the context of the energetic and environmental transition. Our results will allow better understanding of the behavior of the new geosourced material thanks to experimental and numerical investigation.

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Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior

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“…In the ternary specimens of SF5 + WGP10 and SF5 + GGBFS10, at the age of 7 days, a 7.3% reduction in compressive strength compared to the Ctrl specimen can be seen; the reason is the slow rate of pozzolanic reactions of WGP and GGBFS at early ages [86][87][88]. But, at the ages of 28, 56, and 90 days, the ternary specimen of SF5+WGP10 obtained 17%, 12.5%, and 10.3% increases in compressive strength, respectively, compared to the Ctrl specimen because the dissolution of glass particles leads to the creation of free alkali Na + and Si + ions [89,90].…”

Section: Test Results and Discussionmentioning

confidence: 99%

“…Nevertheless, at the ages of 28, 56, and 90 days, the ternary specimen of SF5 + WGP10 obtained 8.7%, 23.4%, and 11.3% increase in tensile strength compared to the Ctrl specimen, respectively. Te increase is due to the pozzolanic reaction of SF and WGP with Ca(OH) 2 , which leads to the formation of C-S-H [88]. Also, at the ages of 28, 56, and 90 days, the ternary specimen of SF5 + GGBFS10 obtained 2.1%, 14.9%, and 3.7% increase in tensile strength compared to the Ctrl specimen, respectively.…”

Section: Splitting Tensile Strengthmentioning

confidence: 95%

“…In the binary specimens of WGP15 and GGBFS15, a slight decrease in tensile strength was observed at the fnal ages compared to the Ctrl specimen. Tis issue can be attributed to the decrease in the amount of cement in these specimens and the low reactivity rate of these two materials at these ages [38,87,88].…”

Section: Splitting Tensile Strengthmentioning

confidence: 98%

“…In the ternary specimens of SF5 + WGP10 and SF5 + GGBFS10 at the age of 7 days, 30.5% and 33.3% reduction in tensile strength was observed compared to the Ctrl specimen, respectively. Te reason for this is the slow reactivity of WGP and GGBFS at early ages to cement [86][87][88]. Nevertheless, at the ages of 28, 56, and 90 days, the ternary specimen of SF5 + WGP10 obtained 8.7%, 23.4%, and 11.3% increase in tensile strength compared to the Ctrl specimen, respectively.…”

Section: Splitting Tensile Strengthmentioning

confidence: 99%

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Evaluation of Mechanical and Durability Properties of Eco-Friendly Concrete Containing Silica Fume, Waste Glass Powder, and Ground Granulated Blast Furnace Slag

Bameri¹,

Rashidi

Mohammadhasani³

et al. 2022

Advances in Materials Science and Engineering

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By considering the adverse environmental impacts of the cement manufacturing process, there have been many efforts for cement replacement by supplementary cementitious materials (SCMs), which can enhance the produced concrete performance while reducing cement consumption. This study evaluated the effects of various proportions of silica fume (SF), waste glass powder (WGP), and ground granulated blast furnace slag (GGBFS) on the mechanical and durability properties of concrete. The properties evaluated in this study include compressive, tensile, and flexural strength, magnesium sulfate and sulfuric acid attack, surface resistivity, rapid chloride penetrability test (RCPT), water absorption, depth of penetration of water, and microstructure analysis by scanning electron microscopy (SEM). The results of compressive, tensile, and flexural strength, chloride ion penetrability, and water absorption tests showed that adding 5% of SF to mixtures containing 10% WGP or 10% GGBFS improved concrete performance significantly due to packing density and synergistic effect; however, adding 5% of SF to concrete mixtures decreased the resistance against the magnesium sulfate and sulfuric acid attack. The binary mixture of 15% of WGP showed appropriate performance against the magnesium sulfate and sulfuric acid attack, which may be due to the sacrificial nature of WGP. In addition, the binary mixtures of 15% of WGP and 15% of GGBFS reduced the depth of penetration of water by 45%. Microstructure analysis by SEM showed that the presence of SF, along with WGP and GGBFS, improves the packing density. Finally, adding 5% of SF is suggested to improve the properties of concrete mixtures containing WGP and GGBFS.

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Cement After Expiry Date: Effect in the Concrete Properties

Rocha

Gonçalves²,

Maia

2022

Lecture Notes in Civil Engineering

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Portland cement has been widely used around the world to produce concrete. When Portland cement is not used correctly, following the normative prescriptions, its use can compromise the aesthetics and the safety of structures. The present research consisted of analyzing the workability of concrete in fresh state and compressive strength in its hardened state when using Portland cement with expired date higher than 90 days defined by the Brazilian standard NBR. For the tests, three cements were selected with different manufacturing dates: November 2018, July 2019 and August 2020. The workability was assessed through the slump test and the compressive strength test at the ages of ages 1, 7, 14 and 28 days. The mix used was for a compressive strength of 25 MPa at the age of 28 days. The slump tests showed divergent values regarding to the expired cements, leading to inconclusive findings, because even with the w/c change, the slump achieved for the 2019 cement-based concrete was lower than that recommended for common concrete. It was concluded that the compressive strength decreased for concretes produced with expired cement.

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On the hygrothermal behavior of concrete containing glass powder and silica fume

Cited by 28 publications

References 71 publications

Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior

Experimental Characterization of Raw Earth Properties for Modeling Their Hygrothermal Behavior

Evaluation of Mechanical and Durability Properties of Eco-Friendly Concrete Containing Silica Fume, Waste Glass Powder, and Ground Granulated Blast Furnace Slag

Cement After Expiry Date: Effect in the Concrete Properties

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