Evaluation of the Modulus of Elasticity of Different Types of Concrete Compared with Eurocode 2

2016 ◽  
Vol 677 ◽  
pp. 181-185
Author(s):  
Klára Křížová ◽  
Rudolf Hela
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Strength Class ◽  
Raw Materials ◽  
Concrete Strength ◽  
Experimental Part ◽  
Static Modulus ◽  
Eurocode 2 ◽  
Different Types ◽  
Static Modulus Of Elasticity

The comparison of really measured compressive strength static modulus of elasticity with table values stated in Eurocode 2 is essential part of the paper. Since the standard draws from modulus of elasticity - concrete strength class, the set compressive strengths will be classified in concrete particular classes. Experimental part was based on several concrete design compositions differing in particular input raw-materials. Monitored values were set with concretes in different ages with final value 180 days. The experiment tries to demonstrate the impossibility of static modulus of elasticity derivation from table values which do not match the present-date produced concretes.

Effect of High Proportion of Blended Cement in Concrete

2014 ◽  
Vol 897 ◽  
pp. 230-233 ◽  
Author(s):  
Klára Křížová ◽  
Rudolf Hela
Keyword(s):  
Modulus Of Elasticity ◽  
Strength Class ◽  
Concrete Strength ◽  
Blended Cement ◽  
Mix Design ◽  
Concrete Compressive Strength ◽  
Static Modulus ◽  
Static Modulus Of Elasticity ◽  
The Given

The paper is concerned with assessment of blended cement high proportion in mix design of concrete. A long term development of concrete compressive strength and static modulus of elasticity were monitored. The cement proportion reached even 450 kg per m3 of concrete. The high proportion of blended cement was used with aim to obtain declared modulus of elasticity values for the given concrete strength class according to EN 1992-1-1. And just the blended cement influence was positively verified in the long-term development of both monitored parameters.

scholarly journals Modulus elasticity of the graded concrete, a preliminary research

2018 ◽  
Vol 195 ◽  
pp. 01005 ◽  
Author(s):  
M. Mirza Abdillah Pratama ◽  
B. Sri Umniati ◽  
Bunga Arumsari Mutiara Wulandari ◽  
Ay Lie Han ◽  
Buntara Sthenly Gan ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Modulus Of Elasticity ◽  
Concrete Strength ◽  
Test Results ◽  
Structural Element ◽  
Concrete Material ◽  
Static Modulus ◽  
Preliminary Research ◽  
Static Modulus Of Elasticity

The elastic modulus of materials plays a role in determining the stiffness of a structural element and its level of serviceability. Previous research indicates that the concrete modulus of elasticity could be improved by combining 2 (two) concrete mixes using a gradual compacting method. In this study, the effect of different concrete strength combinations to the resulting modulus of elasticity is examined. Three types of concrete mixes with a strength of 30 MPa, 40 MPa and 50 MPa are prepared. The graded concrete is moulded in cylindrical concrete casts (150 mm x 300 mm) with the following casting configurations: 30-40 MPa, 30-50 MPa, and 40-50 MPa. The static modulus of elasticity test is performed at an age of 28 days using compressometers in accordance with ASTM C469. The test results show that the modulus of elasticity of the graded concrete is proportionally influenced by the stiffness of the higher and the lower concrete material. Additionally, the resulting compressive strength of the graded concrete is determined by the lower concrete strength.

scholarly journals Influence of Concrete Strength Class on the Long-Term Static and Dynamic Elastic Moduli of Concrete

2021 ◽  
Vol 11 (24) ◽  
pp. 11671
Author(s):  
Sergiu-Mihai Alexa-Stratulat ◽  
Petru Mihai ◽  
Ana-Maria Toma ◽  
George Taranu ◽  
Ionut-Ovidiu Toma
Keyword(s):  
Modulus Of Elasticity ◽  
Strength Class ◽  
Concrete Strength ◽  
Construction Materials ◽  
Point Of View ◽  
Design Stage ◽  
Static Modulus ◽  
Increasing Demand ◽  
Static Modulus Of Elasticity

Construction materials, among which concrete is by far the most used, have followed a trend of continuously increasing demand in real estate. A relatively small number of research works have been published on the long-term material properties of concrete in comparison to studies reporting their findings at standard curing ages of 28 days. This is due, in part, to the length of time one must wait until the intended age of concrete is reached. The present paper contributes to filling this gap of information in terms of the strength and dynamic elastic properties of concrete. The dynamic modulus of elasticity may be used to assess the static modulus of elasticity (Young’s modulus), a key property used during the design stage of a structure, in a non-destructive manner. This paper presents the results obtained from laboratory tests on the long-term (6 years) characterization of concrete from the point of view of dynamic shear and longitudinal moduli of elasticity, dynamic Poisson’s ratio, static modulus of elasticity, compressive and tensile splitting strengths, and their change depending on the concrete strength class.

scholarly journals Influence of Hybrid Fibers on Toughness Behavior of High Strength Flowing Concrete

2011 ◽  
Vol 57 (3) ◽  
pp. 249-260 ◽  
Author(s):  
Eethar Thanon Dawood ◽  
Mahyuddin Ramli
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Modulus Of Elasticity ◽  
Hybrid Composite ◽  
High Strength ◽  
Steel Fibers ◽  
Hybrid Fibers ◽  
Static Modulus ◽  
Static Modulus Of Elasticity ◽  
Strength And Toughness

Abstract This study investigates the use of steel fibers and hybrid composite with a total fibers content of 2% on the high strength flowing concrete and determines the density, compressive strength, static modulus of elasticity, flexural strength and toughness indices for the mixes. The results show that the inclusion of more than 0.5% of palm fibers in hybrid fibers mixes reduces the compressive strength. The hybrid fibers can be considered as a promising concept and the replacement of a portion of steel fibers with palm fibers can significantly reduce the density, enhance the flexural strength and toughness. The results also indicates that the use of hybrid fibers (1.5 steel fibers + 0.5% palm fibers) in specimens increases significantly the toughness indices and thus the use of hybrid fibers combinations in reinforced concrete would enhance their flexural toughness & rigidity and enhance their overall performances

scholarly journals Petrographic and Mechanical Characteristics of Concrete Produced by Different Type of Recycled Materials

Geosciences ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 264 ◽  
Author(s):  
Petros Petrounias ◽  
Panagiota P. Giannakopoulou ◽  
Aikaterini Rogkala ◽  
Paraskevi Lampropoulou ◽  
Basilios Tsikouras ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Mechanical Characteristics ◽  
Strength Class ◽  
Concrete Strength ◽  
Glass Waste ◽  
Recycled Materials ◽  
Curing Conditions ◽  
Different Types ◽  
Green Glass ◽  
Water Saturated

This paper examined three different types of recycled materials, such as beer green glass, waste tile, and asphalt, which will be used in different mixtures in order to prepare concrete specimens and, more specifically, their effect on concrete strength and how the petrographic characteristics of various recycled materials influenced the durability of C25/30 strength class concrete. Particular emphasis was placed on the effect of artificial microroughness of glassy and smooth surfaces of recycled materials on their final concrete strength. The concrete strength values do not show great variance, but their limited differences have been qualitatively interpreted by a new promising petrographic methodology, including the study of the surface texture of the used aggregate materials. Concretes are produced with constant volume proportions, workability, mixing, and curing conditions while using different sizes of each aggregate type. The aggregates were mixed both in dry and water saturated states in concretes. Concretes that are made by a mixture of beer green glass with quartz primer, as well as of tile with quartz primer, presented the optimum possible results of the compressive strength.

Experimental Analysis of the Development of Compressive Strength, Modulus of Elasticity and Acoustic Emission Parameters of Alkali-Activated Composites

2018 ◽  
Vol 760 ◽  
pp. 266-271
Author(s):  
Dalibor Kocáb ◽  
Libor Topolář ◽  
Vlastimil Bílek Jr. ◽  
Barbara Kucharczyková ◽  
Michaela Hoduláková ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Acoustic Emission ◽  
Modulus Of Elasticity ◽  
Stress Test ◽  
Ultrasonic Pulse ◽  
Static Modulus ◽  
Activated Slag ◽  
Static Modulus Of Elasticity ◽  
Non Destructive ◽  
Alkali Activated

This paper describes an experiment focused on monitoring the development of the modulus of elasticity and the compressive strength of composites that are based on alkali‑activated slag (AAS) during the first 28 days of ageing. The test specimens were tested at the age of 3 and 28 days using two non-destructive methods (ultrasonic pulse and resonance methods) to determine the value of the dynamic modulus of elasticity. Subsequently, the same specimens were used to determine the static modulus of elasticity using compressive stress test, during which the behaviour of the composite was monitored by equipment for recording the acoustic emission in the material. The result of the experiment is the evaluation of the behaviour of the AAS composite in regard to the development of its modulus of elasticity and compressive strength, as well as in regard to the acoustic emission method during loading.

Experimental Assessment of the Influence of Multiple Cyclic Loading on Selected Properties of Lightweight Concrete

2019 ◽  
Vol 292 ◽  
pp. 45-49
Author(s):  
Petr Misák ◽  
Dalibor Kocáb ◽  
Martin Alexa ◽  
Barbara Kucharczyková ◽  
Petr Daněk ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Cyclic Loading ◽  
Modulus Of Elasticity ◽  
Test Specimen ◽  
Lightweight Concrete ◽  
Test Results ◽  
Static Modulus ◽  
Before And After ◽  
The Difference ◽  
Static Modulus Of Elasticity

The paper deals with results of the experiment when ordinary and lightweight concrete was subjected to cyclic loading. Each test specimen was loaded with the force equivalent to one third of the expected compressive strength value similarly to the static modulus of elasticity test with the difference that the total number of loading cycles was nearly 4500. Dynamic modulus of elasticity and compressive strength was measured before and after cyclic loading. The result of this experiment is statistical analysis of the test results and assessment of the influence of multiple cyclic loading.

Static Modulus of Elasticity of Concrete

2015 ◽  
Vol 824 ◽  
pp. 151-154
Author(s):  
Pavel Reiterman
Keyword(s):  
Experimental Investigation ◽  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Hardened Concrete ◽  
Static Modulus ◽  
Concrete Mixtures ◽  
Compressive Strength Of Concrete ◽  
Static Modulus Of Elasticity

Present paper deals with the experimental investigation of static modulus of elasticity of hardened concrete and its relation to compressive strength of concrete. Based on the number of measurement was derived expression of dependence of modulus of elasticity on compressive strength of concrete which was determined using cubic specimens; modulus of elasticity was measured using prismatic specimens of dimensions 100x100x400 mm. Studied concrete mixtures present commonly used concrete of all established strength classes.

Mechanical Characteristics of Pavers with Iron Ore Tailings

2017 ◽  
Vol 864 ◽  
pp. 330-335
Author(s):  
J.N.R. Mantilla ◽  
Diego N. Miranda ◽  
Jamile Salim Fuina ◽  
E.V.M. Carrasco
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Iron Ore ◽  
Compression Tests ◽  
Natural Sand ◽  
Static Modulus ◽  
Concrete Mixtures ◽  
Iron Ore Tailings ◽  
Simple Compression ◽  
Static Modulus Of Elasticity

The objective of this study is to evaluate experimentally the mechanical compressive strength and static modulus of elasticity of concrete pavers for floors made with iron ore tailings as aggregate concrete. Pavers were manufactured with four different concrete mixtures (cement, natural sand, industrial sand, iron ore tailings, crushed stone), and performed simple compression tests to determine the compressive strength and modulus of elasticity. The pavers manufactured with those concrete mixtures showed greater strength specified by the Brazilian standard. It was possible to find a correlation between modulus of elasticity and compressive strength.

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