High performance structural lightweight concrete utilizing natural perlite aggregate and perlite powder

Download

index.pdf

Date

2014

Author

Eser, Hasan

Metadata

Show full item record

Item Usage Stats

374
views

133
downloads

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 perlite aggregate and perlite powder in comparison to those of high-strength normal weight concrete of similar specific strength (structural efficiency). For this purpose, three concrete mixtures have been designed, namely high-strength lightweight concrete (HSLWC), self-compacting high strength lightweight concrete (SCLWC) and high-strength normal weight concrete (HSNWC). An extensive testing program was conducted on concrete specimens to determine fresh properties such as slump, slump flow, unit weight, air content and setting time; hardened properties such as compressive strength, splitting and flexural tensile strength, modulus of elasticity and thermal coefficient of expansion; durability characteristics such as rapid chloride-ion penetrability, resistance to aggressive chemical solutions and freezing-thawing resistance. The results have shown that natural perlite aggregate and perlite powder can be satisfactorily utilized in the production of self-compacting lightweight concrete with 28-day compressive strengths up to 50 MPa. It is also shown that perlite aggregate containing high performance lightweight concretes have generally superior or at least similar durability performance to that of high-strength normal weight concrete of similar specific strength.

Subject Keywords

Concrete., Perlite., Concrete, Lightweight concrete., Lightweight construction.

URI

http://etd.lib.metu.edu.tr/upload/12616761/index.pdf
https://hdl.handle.net/11511/23253

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Estimation of lightweight expanded clay aggregate concrete’s compressive strength by using meta-analysis Uslu, İlbüke; Yaman, İsmail Özgür; Aktaş, Can Baran; Department of Civil Engineering (2023-1-27) 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...
Life cycle assessment (LCA) of different concrete mixtures and an application in a green building Tükenmez, Elif; Dilek, Filiz Bengü; Department of Environmental Engineering (2019) Concrete is the most utilized building materials on a global scale. Raw materials and energy are required in high quantity for the production phase of the concrete which mainly consists of cement, aggregate, water and admixtures. This causes significant environmental concern for the sustainable development of the building sector. Therefore, environmental impact assessment studies conducted for concrete production are gaining importance, over the last two decades. Life Cycle Assessment (LCA) is the most effe...
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...
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...
High Performance Fiber Reinforced Concrete for Pavements Şengün, Emin; Alam, Burhan; Yaman, İsmail Özgür (2016-09-21) The addition of fibers has allowed concrete to take a role in the field of ductile materials. In this field, pavements were always a challenge and a success for concrete. To be a strong rival to asphalt, concrete needs to be more flexible, which is possible by the use of fibers. However, for this concrete pavement to be able to survive and last as long as possible it needs to be a high performance one. The shy use of concrete pavements in Turkey shows the need for further researches on the local base to all...

Citation Formats

H. Eser, “High performance structural lightweight concrete utilizing natural perlite aggregate and perlite powder,” M.S. - Master of Science, Middle East Technical University, 2014.