The effect of glass powder on physical and mechanical properties of hardened cement paste

Barkauskas, Kęstutis; Nagrockienė, Džigita; Girnienė, Ingrida

doi:10.3846/mbmst.2019.137

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…Glass powder's impact on the characteristics of cement pastes that have hardened is tested by Barkauskas et al [9]. With constant types of cement and constant ratios of water to fines, seven compositions of cement paste mixes were used, each containing varying percentages of crushed glass (0-30%).…”

Section: Introductionmentioning

confidence: 99%

Effect of unconventional supplementary cementitious materials on the hardened cement pastes exposed to high temperature

Fehérvári

2023

J Therm Anal Calorim

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An investigation was conducted to determine how Ordinary Portland Cement and several unconventional cementitious additives, such as magnetite, chamotte, perlite, boron carbide, and more common powdered quartz, affected the behaviour of hardened cement paste when subjected to high temperatures. The test was conducted using a constant water–fines ratio of 0.3. The water–cement ratios were nevertheless 0.25 and 0.222 as a result of the two fine replacement ratios (20% and 35%, respectively). Seven heat steps were used to heat the specimens of hardened cement paste to 900 °C. On the cooled specimens, comparisons between relative residual compressive strength and residual compressive strength were made. Additionally, a new approach known as "temperature endurance" is used to express the total area under each strength curve. Furthermore, the specimens were analysed using a scanning electron microscope. Our research has shown that perlite, when employed as additional cementitious material, performs remarkably well and has favourable effects, even at high temperatures. Up to 600 °C, it has the longest-lasting, practically constant residual strength values. In this area, the relative strength reductions are less than 15%. Furthermore, it is shown that boron carbide increases compressive strength at 900 °C in comparison to values at 600 °C. Due to the material's low melting point and the formation of secondary bindings at the highest heat step, this effect results. The other materials under investigation, such as powdered quartz, magnetite, and powdered chamotte, perform only slightly better than the reference homogeneous Ordinary Portland Cement, particularly in the mid and high heat ranges. In low heat ranges and by lower addition of fines, particularly in the well-known local strength maximum of 200–300 °C, homogeneous matrixes perform better.

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Section: Introductionmentioning

confidence: 99%

Effect of unconventional supplementary cementitious materials on the hardened cement pastes exposed to high temperature

Fehérvári

2023

J Therm Anal Calorim

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“…Glass powder's impact on the characteristics of cement pastes that have hardened is tested by Barkauskas et al [25]. With constant types of cement and constant ratios of water to fines, seven compositions of cement paste mixes were used, each containing varying percentages of crushed glass (030%).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Elevated Temperature on Ordinary Portland Cements

Fehérvári

2022

Period. Polytech. Civil Eng.

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A study was directed to analyze the influence of the different types of Ordinary Portland Cements (OPC) on the hardened cement paste exposed to high temperatures. Hardened cement paste specimens with three types of cement and nine water-cement ratios were investigated and heated to 11 heat steps at 28 days of age. Residual compressive strength and relative residual compressive strength were compared to the unheated results. It was shown that the expected range for the relative residual strength of the different types of OPC up to 400 °C is between 90 and 100%. From the local minimum at 150 °C to the maximum at 300 °C. The CEM I 52.5 type of cement shows the least favorable behavior to the increased (over 400 °C) temperature, according to the results of the residual compressive strengths curves and the newly introduced Integrated Temperature Endurance values after the first water-cement ratio (0.3). Nine water-cement ratios were tested with the favorable types of OPC (CEM I 42.5 and CEM I 32.5). At all water-cement ratios, the residual strength tendencies for the two types of cement were parallel. It has been observed that changes in the water-cement ratio have little to no impact on the relative strength curve's shape or the relationship between strength and the water cement ratio. As a result of our experiments applying simply Ordinary Portland Cement, it is obvious that the CEM I 32.5 type of OPC cement significantly outperformed the CEM I 42.5 type in regards of post-heating strength tendencies.

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“…It was observed that the composite reinforced with 9 wt% coconut fiber showed the highest strength of modulus of rupture and compressive strength. Kstutis Barkauskas and al analyzed the effect of finely crushed glass on the properties of hardened cement paste (Kȩstutis et al 2019). The test results revealed that the hardened cement paste containing 5% ground glass by weight of cement was found to have higher strength and density than the unmodified cement paste.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the physical-mechanical properties of mortar with cement/‘Ndoor’ composite binder

Takam¹,

Tatchuen²,

Tchitnga³

et al. 2022

Eng. Res. Express

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The aim of our work is to characterize a mortar with a cement/"Ndoor" composite binder. We determine experimentally the mechanical properties of a mortar modified by partial substitution of cement by an addition called "Ndoor". In experimental campaign, we realize different formulations of mortar diversified by the dosage of cement and "Ndoor", which were made in the form of prismatic specimens 4*4*16 cm3. Compression tests were carried out, which allowed us to obtain the values of compressive strength and tensile strength. The results show that the "Ndoor" improves the development of the mechanical resistances at the young age especially for values of substitution of the order of 2.5%, 5% and 7.5%. As a complement to the tests, a modeling having a predictive character of the elastic behavior of a mortar elastic behavior of a composite cement/"Ndoor" binder mortar is done. For this purpose, we have mortar has two phases : the hydrated cement paste and the inclusions (sand and "Ndoor"). The elastic properties of the cement paste are determined by the self-coherent homogenization model. Knowing the elastic properties of the cement paste and the inclusions, those of the mortar are deduced by the diluted scheme model of ESHELBY. The results show that, in the presence of the "Ndoor", as the mass ratio e/c increases, the Young’s modulus of the modified mortar decreases

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The effect of glass powder on physical and mechanical properties of hardened cement paste

Cited by 6 publications

References 10 publications

Effect of unconventional supplementary cementitious materials on the hardened cement pastes exposed to high temperature

Effect of unconventional supplementary cementitious materials on the hardened cement pastes exposed to high temperature

The Effect of Elevated Temperature on Ordinary Portland Cements

Evaluation of the physical-mechanical properties of mortar with cement/‘Ndoor’ composite binder

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