Emerging trends in the growth of structural systems for tall buildings

Memon, Shazim Ali; Zain, Muhammad; Zhang, Dichuan; Rehman, Sardar Kashif Ur; Usman, Muhammad; Lee, Deuck Hang

doi:10.1080/24705314.2020.1765270

Cited by 21 publications

(8 citation statements)

References 15 publications

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“…Further, detailed studies should be carried out on self-compacting concrete using WBBP as a binary or tertiary mineral additive with other secondary raw materials such as fly ash, blast furnace slag, and silica fumes. Moreover, several applications of self-compacting concrete need to be explored such as double-skin tubular members and other components of tall buildings [ 96 , 97 , 98 ].…”

Section: Discussionmentioning

confidence: 99%

Utilization of Solid Waste from Brick Industry and Hydrated Lime in Self-Compacting Cement Pastes

et al. 2021

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The huge amount of solid waste from the brick manufacturing industry can be used as a cement replacement. However, replacement exceeding 10% causes a reduction in strength due to the slowing of the pozzolanic reaction. Therefore, in this study, the pozzolanic potential of brick waste is enhanced using ultrafine brick powder with hydrated lime (HL). A total of six self-compacting paste mixes were studied. HL 2.5% by weight of binder was added in two formulations: 10% and 20% of waste burnt brick powder (WBBP), to activate the pozzolanic reaction. An increase in the water demand and setting time was observed by increasing the replacement percentage of WBBP. It was found that the mechanical properties of mixes containing 5% and 10% WBBP performed better than the control mix, while the mechanical properties of the mixes containing 20% WBBP were found to be almost equal to the control mix at 90 days. The addition of HL enhanced the early-age strength. Furthermore, WBBP formulations endorsed improvements in both durability and rheological properties, complemented by reduced early-age shrinkage. Overall, it was found that brick waste in ultrafine size has a very high degree of pozzolanic potential and can be effectively utilized as a supplementary cementitious material.

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Section: Discussionmentioning

confidence: 99%

Utilization of Solid Waste from Brick Industry and Hydrated Lime in Self-Compacting Cement Pastes

et al. 2021

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“…For SNiP code, it includes the detailed method with the projection length (c) presented in Equations ( 11) and ( 12) and its simplified method calculated by Equations ( 13) and ( 14) with no projection length (c). For ACI 318, the approach with 45 for the inclination angle of compression strut θ ACI, 45 ð Þand that with variable angle by utilizing Equation ( 21) θ ACI,eq À Á were used in estimating torsional strengths. For Eurocode 2, the torsional strengths were primarily estimated at balance point as specified by the code where the inclination angle is defined as θ EC2 , and another method was also considered, in which the angle is estimated using Equation (30) to be defined as θ EC2,eq for estimating the torsional strengths of specimens.…”

Section: Referencementioning

confidence: 99%

Torsional design method used in Eurasia region: A comparative study

Lee

Kim

et al. 2021

Structural Concrete

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This study conducted an extensive review and evaluation of torsional design methods specified in SNiP and other international building codes. Unlike thin‐walled tube approach utilized as a key basis of design expressions in ACI 318, CSA, and Eurocode 2, skew‐bending theory is still adopted as torsional design methods specified in SNiP code used through Eurasia region. This comparative study is timely required since there are radical code changes in leading Eurasia countries, such as Russia, Kazakhstan, and Uzbekistan, toward Eurocode from SNiP code. To this end, a total of 253 reinforced concrete (RC) specimens that failed in pure torsion were collected from the literature to compare the analytical accuracy of the torsional design methods specified in various design codes. It was found that the torsional design methods specified in SNiP and CSA codes can estimate the torsional strengths of RC members with good level of accuracy, while Eurocode 2 provided quite conservative results. In addition, the maximum limitations stipulated in each design code on the compressive strength of concrete and yield strength of reinforcements are of importance for the safe and efficient torsional design due to interrelation between reinforcement ratios considering materials strengths and inclination angle of compressive concrete strut.

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“…One of the most popular building components that is known for its wide range of usage due to its strength and durability is concrete [1,2]. Over 90% of all residential and commercial buildings in Nigeria are made of reinforced concrete, which is a result of its properties making it a particularly essential material in the country's construction industry [3,4]. Almost one-third of the volume of concrete, or between 60 and 75 percent of the overall volume of concrete, is made up of coarse aggregate [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Utilization of response surface methodology in optimization of locally sourced aggregates

Ogunjiofor¹,

Ayodele²

2023

5003

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This research investigated the optimization of locally sourced aggregate, mixed with variable cement ratios to determine its optimum compressive strength. Samples of standard sizes of local fine and coarse aggregate were obtained at the popular excavation sites. The concrete materials were weighed, batched, mixed, cast and cured using four different mix proportions of 1:2:4, 1.2:2:4, 1.4:2:4 and 1.6:2:4 of cement, fine and coarse aggregate at constant water/cement ratio of 0.5. A total of 48 concrete cubes of 150mmx150mmx150mm were produced, cured for 7, 14, 21 and 28 days and tested. Mathematical model equation relating the compressive strength of the local stone with variability of cement was developed using Response Surface Methodology (RSM). The significance and suitability of the equation was confirmed using the analysis of variance (ANOVA). The ANOVA for the quadratic and Surface Cubic model shows that the adjusted R2 of 0.9808 and F-value of 227.76 in compressive strength of the concrete is confidently accounted for by the independent variable. This demonstrates that the equation's predictions of compressive strength for various concrete structures are accurate. Therefore, utilization of local aggregate is advised for the construction of most of the dominant low-rise residential buildings in Anambra and other neighbouring States.

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Emerging trends in the growth of structural systems for tall buildings

Cited by 21 publications

References 15 publications

Utilization of Solid Waste from Brick Industry and Hydrated Lime in Self-Compacting Cement Pastes

Utilization of Solid Waste from Brick Industry and Hydrated Lime in Self-Compacting Cement Pastes

Torsional design method used in Eurasia region: A comparative study

Utilization of response surface methodology in optimization of locally sourced aggregates

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