Critical Evaluation for Grading and Fineness Modulus of Concrete Sands used in Sulaymaniyah City-Iraq

Muhammad, Muhammad A.; Mohammed, Bilal K.; Ahmed, Faris R.; Numan, Bayan S. Al

doi:10.31026/j.eng.2021.10.03

Cited by 5 publications

(2 citation statements)

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“…The fine aggregate was natural sand with a higher fineness modulus of 3.07, satisfying ASTM specification limits. There was a lot of discussion and analysis of various fields and data [17]. The physical properties of coarse and fine aggregates are shown in Table 3.…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

Mohammed,

Al-Numan

2024

Sustainability

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The objective of this study is to investigate the performance of normal- and high-strength concretes including limestone powder (LP) through their mechanical properties. Moreover, sustainable flat plates made of these concretes were investigated through their punching strength. For this purpose, two different types of concrete (normal- and high-strength) with various limestone replacement ratios of 0%, 5%, 15%, and 20% by weight were designed. The fresh and hardened characteristics of the mixtures were investigated at various ages. By this means, the experimental behavior of reinforced concrete (RC) flat plate slabs made with limestone powder subjected to punching shear failure was studied. Slump value increased up to a 5% replacement of LP; after that, there was a tendency for the slump value to decrease as the replacement of limestone in normal-strength LP concrete increased. However, slump values for high-strength LP concrete increased as the LP replacement amount increased. There was a steady decrease in the compressive strength and splitting tensile strength values with the increase in LP content in normal concrete. However, in the high-strength LP concrete, with more than 10% of replacement LP, a decrease in the compressive strength values and splitting tensile strength values occurred. Compared to the control slab specimen without LP, in normal strength, the slab specimens with LP exhibit a larger ultimate shear load for slab specimens containing 5% and 10% of LP. The maximum increment for RC slabs containing 10% limestone powder was 3.8%. However, in high-strength concrete, the slab specimens with LP remained at the same ultimate shear load as control slabs, up to 10% of LP. high-strength concrete slabs with 5–20% LP showed an overall increase of (17.2%) in punching strength over the corresponding LP normal-strength concrete slabs. The corresponding increase for control slabs was 18.8%. It can be concluded that introducing LP improves the slab punching strength in a similar way that is found in non-sustainable slabs when using either normal- or high-strength concrete.

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Section: Methodsmentioning

confidence: 99%

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

Mohammed,

Al-Numan

2024

Sustainability

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“…A lot of factors influence the compressive the compressive strength of concrete, such as the material properties of cement and aggregates, the specimen size, etc [44]. In this study the results of the compressive strength test with lightweight brick waste used as the substitute for fine aggregate of each variations are shown in (Fig.…”

Section: Compressive Strength Of Concretementioning

confidence: 98%

Compressive Strength of Concrete Using Lightweight Brick Waste as the Substitute for Fine Aggregate

Martina¹

2022

GEOMATE

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Concrete is one of Indonesia's most widely used construction materials. Thus, the need for concrete materials, mainly sand keeps increasing. Excessive sand mining will harm the environment, causing erosion and landslides. In addition, recent trends in construction have created negative impacts to the nature, such as the dumping of lightweight bricks remnant. This study was conducted to examine the use of lightweight brick waste as a substitute for fine aggregate on the compressive strength of concrete. The design of concrete in this research uses SNI 03 -2834 -2002 as the guidelines. The variations are 0%, 10%, 20%, and 30% of lightweight brick waste to replace fine aggregate. This research uses quantitative primary data to obtain the compressive strength of concrete. The tests were held on the seventh, fourteenth, and twentyeighth day of concrete age, and simple regression analysis was used to determine the effect of weight on the use of brick wastes as a partial substitution of fine aggregate on the compressive strength of concrete. The results show that the maximum and minimum compressive strengths were obtained in variation 10% and variation 30%, which produce the compressive strengths 24.45 MPa and 18.03 MPa at the twenty-eighth day of concrete. Based on the results of the simple regression analysis with SPSS, the use of lightweight brick waste has a significant effect on the compressive strength of twenty-eight day of concrete by 64.8% and the linear regression formula in this test can be written as Y = 24.3 -0.170x.

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Evaluation of deflection and flexural performance of reinforced concrete beams with glass fiber reinforced polymer bars

Muhammad

Ahmed

2023

Case Studies in Construction Materials

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Critical Evaluation for Grading and Fineness Modulus of Concrete Sands used in Sulaymaniyah City-Iraq

Cited by 5 publications

References 0 publications

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

Compressive Strength of Concrete Using Lightweight Brick Waste as the Substitute for Fine Aggregate

Evaluation of deflection and flexural performance of reinforced concrete beams with glass fiber reinforced polymer bars

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