Estimation of lightweight expanded clay aggregate concrete’s compressive strength by using meta-analysis

Download

ilbukeuslu-Thesis.pdf

Date

2023-1-27

Author

Uslu, İlbüke

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

157
views

109
downloads

One of the most effective methods of reducing the density of concrete is the incorporation of lightweight aggregates. Lightweight expanded clay aggregate (LECA) is preferred in lightweight concrete production due to its high compressive strength when compared to other lightweight aggregates. The study aims to assess the compressive strength of LECA incorporated lightweight concrete through meta-analysis. Within the scope of the study, more than 140 data points are compiled through literature and analyzed to conduct the meta-analysis of LECA incorporated lightweight concrete properties. Detailed statistical analysis procedures such as ANOVA and regression analysis are used to investigate the relations between the amount of LECA, w/c ratio, amount and type of binder, and the compressive strength and density of lightweight concrete. An equation is derived to estimate the relationship between the 28-day compressive strength and the evaluated variables based on the regression analysis. It includes 15 different studies conducted independently, as the equation is derived by using the meta-analysis. It is statistically more robust than single studies conducted independently from each other due to the combined effect. Results indicate that the effect of LECA, water, and cement on the 28-day compressive strength is more than the amount of fly ash and silica fume. Moreover, 13 different mixtures are prepared to evaluate the accuracy of the estimations according to the compressive strength test results. Estimations and compressive strength test results are compared to determine the accuracy of the derived equation.

Subject Keywords

Lightweight expanded clay aggregate, Lightweight concrete, Meta-analysis, Strength estimation

URI

https://hdl.handle.net/11511/102543

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Determination of the Tensile Strength of Different Fiber Reinforced Concrete Mixtures Ardoğa, Mehmet Kemal; Alam, Burhan; Yaman, İsmail Özgür (null; 2016-09-21) Enhancing the tensile performance of concrete is the main advantage when fibers are added to this type of building materials. This improvement is usually measured through indirect methods like bending or split-tensile tests, in a way similar to normal concrete due to the absence of a standard tensile test for such purpose. Naturally, this type of tests does not determine the real tensile strength of the fiber reinforced concrete. Hence an important parameter, that is needed in modelling and designing proces...
Physical and mechanical properties of lightweight expanded clay aggregate concrete Uysal, Orkun; Yaman, İsmail Özgür; Aktaş, Can Baran; Department of Civil Engineering (2023-1-27) Expanded clay aggregate is an artificial type of aggregate manufactured from clay, and it has a porous nature, making it lighter than normal weight aggregates. When used in concrete, this porous nature is decisive in the physical and mechanical properties of concrete. A comprehensive experimental study was carried out on physical and mechanical properties like density, absorption capacity, porosity, compressive strength, splitting tensile strength, and modulus of elasticity. In this context, 13 different mi...
High performance structural lightweight concrete utilizing natural perlite aggregate and perlite powder Eser, Hasan; Turanlı, Lütfullah; Department of Civil Engineering (2014) Structural Lightweight Concrete is generally made by using artificial lightweight aggregates such as expanded clay, shale and slate. However, rapidly increasing fuel prices in recent decades and corresponding increase in the production costs of these aggregates have renewed the interest in natural lightweight aggregates such as pumice, scoria, rhyolite and perlite. This study investigates the mechanical properties and durability characteristics of high-performance lightweight concretes utilizing natural per...
Assessment of the nonlinear behavior of rc moment resisting framed buildings made of structural lightweight concrete Şenel, Mehmet Ali; Sarıtaş, Afşin; Turanlı, Lütfullah; Department of Civil Engineering (2015) Lightweight concrete does differ from normal weight concrete with the aggregate type used in the composition. Use of lightweight concrete reduces the dead weights of structures. On the contrary to general idea in Turkey, lightweight concrete has adequate performance to be used for structural purposes. The drawback of the use of lightweight concrete for structural purposes is the lack of reliable studies as performed for normal weight concrete. In the scope of this study, confinement effect of lightweight co...
Analytical modeling of fiber reinforced composite deep beams Yağmur, Eren; Burak Bakır, Burcu; Department of Civil Engineering (2018) Discrete fibers are often used as reinforcement to increase the tensile and shear strengths of concrete. For many years, the behavior of fiber reinforced composite members has been investigated both experimentally and analytically. The influence of fibers on the behavior of shear critical members is quite significant, therefore, it is inevitable to develop a method, which estimates the shear strength of fiber reinforced composite deep beams realistically. This is why one of the main objectives of this study...

Citation Formats

İ. Uslu, “Estimation of lightweight expanded clay aggregate concrete’s compressive strength by using meta-analysis,” M.S. - Master of Science, Middle East Technical University, 2023.