The Effect of Coarse Aggregate Gradation Degradation on the Mechanical Behavior of Asphalt Mixture

2013 ◽  
Vol 811 ◽  
pp. 223-227
Author(s):  
Yong Ye ◽  
Hong Kai Chen ◽  
Yi Zhou Cai
Keyword(s):  
Compressive Strength ◽  
Creep Behavior ◽  
Coarse Aggregate ◽  
Asphalt Mixture ◽  
Aggregate Size ◽  
Test Results ◽  
Creep Tests ◽  
Aggregate Gradation ◽  
Coarse Aggregates ◽  
Static Creep

The objective of this study is to investigate and evaluate the effect of coarse aggregates (aggregate size bigger than 2.36 mm) on the compressive strength and creep behavior of asphalt mixture. The variable that is mainly considered in the study is the gradation degradation of coarse aggregates. A kind of standard aggregate gradation and three kinds of degraded aggregate gradation mixture specimens are used. Uniaxial compression and static creep tests were realized at different loading conditions and temperatures. The test results on asphalt mixture showed that the compressive strength and creep behavior of asphalt mixture are significant affected by the different coarse aggregate gradations.

Laboratory Investigate of the Effect of Fine Aggregates on Asphalt Mixture Materials

2011 ◽  
Vol 225-226 ◽  
pp. 577-580
Author(s):  
Yong Ye ◽  
Yi Zhou Cai
Keyword(s):  
Compressive Strength ◽  
Asphalt Mixture ◽  
Aggregate Size ◽  
Asphalt Mixtures ◽  
Fine Aggregate ◽  
Test Results ◽  
Creep Tests ◽  
Aggregate Gradation ◽  
Static Creep ◽  
Fine Aggregates

The objective of this study is to investigate and evaluate the effect of fine aggregates (aggregate size smaller than or equal to 2.36 mm) on the compressive strength and creep behavior of asphalt mixtures. The variables that are considered in the study include the sizes and gradations of fine aggregate. A kind of standant aggregate gradation and four kinds of reduced aggregate gradation mixture specimens are used. Uniaxial compression and static creep tests were realized at different loading conditions. The test results showed that the different fine aggregate sizes do not result in significant differences in compressive strength and creep values using the same percentage of fine aggregates (38.4%). Only the different gradations showed a little differences for mixtures made with different gradations but same aggregate size (between 2.36 and 1.18 mm).

scholarly journals Evaluation of the Effects of Coarse Aggregate Sizes on Concrete Quality

2017 ◽  
Vol 2 (10) ◽  
pp. 1 ◽  
Author(s):  
Lawrence Echefulechukwu Obi
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Aggregate Size ◽  
Test Results ◽  
Construction Sites ◽  
Coarse Aggregates ◽  
Appreciable Increase ◽  
Concrete Production ◽  
Concrete Quality

This work was necessitated by the observations made at construction sites where artisans and craftsmen were left alone in concrete production. It was discovered that they used inadequate quantity and size of coarse aggregates due to difficulty associated in the mixing as if the coarse aggregates were not needed in concrete production. The research has established that the coarse aggregates and their sizes play critical roles in the development of adequate strength in concrete. It was observed that with proper mixing, the slump test results did not witness shear or collapse type of slump rather there were true slump in all cases of the test. The workability decreased with slight differences when the coarse aggregate size was increased. The increase in the coarse aggregates yielded appreciable increase in the compressive strength. It can therefore be inferred that the quality of concrete in terms of strength can be enhanced through an increase in the coarse aggregate size when proper mix ratio, batching, mixing, transporting, placing and finishings are employed in concrete productions.

scholarly journals EFFICACY OF BASALT AND GRANITE AS COARSE AGGREGATE IN CONCRETE MIXTURE

2020 ◽  
Vol 7 (9) ◽  
pp. 1-9
Author(s):  
S.E Ubi ◽  
P.O Nkra ◽  
R.B Agbor ◽  
D.E Ewa ◽  
M. Nuchal
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Specific Gravity ◽  
Coarse Aggregate ◽  
Strength Properties ◽  
Test Results ◽  
Physical Test ◽  
Coarse Aggregates ◽  
Structural Tests ◽  
Comparative Results

This present research was on the comparison of the efficacious use of basalt and granite as coarse aggregates in concrete work. In order to obtain the basis for comparison, physical and structural tests were conducted on the different materials of the concrete and the concrete samples respectively. Physical test results revealed that basalt have a specific gravity of 2.8 and 2.5, while granite have a specific gravity of 2.9 and 2.6. In density, basalt have a density of 1554.55kg/m3 while granite had a density of 1463.64kg/m3. Aggregate impact test conducted on both aggregates revealed a percentage of 11.05% for basalt and 12.63% for granite. The following structural tests were carried out: compressive strength tests, flexural and tensile strength test and the comparative results are as follows. Compressive strength for basalt 36.39N/mm2 while 37.16N/mm2 for granite. 24.81N/mm2 tensile strength for basalt while 12.57N/mm2 for granite, 31.83N/mm2 flexural strength for basalt while 27.97N/mm2 for granite. From the above results, it can be deduced that basalt has higher strength properties than granite. Therefore, more suitable for coarse aggregate in achieving higher strength with some quantity of other composition of the concrete mix when compared to granite.

Aggregate Rugosity and Size Effect on Bituminous Mixes

1998 ◽  
Vol 1619 (1) ◽  
pp. 26-36 ◽  
Author(s):  
Taisir S. Khedaywi ◽  
Egons Tons
Keyword(s):  
Coarse Aggregate ◽  
Aggregate Size ◽  
Surface Characteristics ◽  
Fine Aggregate ◽  
Regression Equations ◽  
Test Results ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Size Fractions ◽  
Coarse Aggregates

Higher costs and possible restricted availability of asphalt have stimulated research and discussion on how to reduce the amount of asphalt in bituminous mixes without sacrificing service. A hypothesis was proposed suggesting that for each coarse aggregate type with different surface characteristics there is a specific fine aggregate size that contributes to developing an interlocking mechanism between the surfaces of coarse aggregates when they are combined in a bituminous mix. To test this hypothesis, two types of coarse aggregates having different surface characteristics or rugosity, limestone and rounded gravel, were used. For each aggregate, two one-size fractions were tested—19 mm to 25 mm and 6.4 mm to 4.75 mm. One type of fine aggregate (limestone) with five one-size fractions was used. Four flow binder film thicknesses were chosen. The packing volume and rugosity concepts were the theoretical basis. Asphalt and aggregate mixes were tested in compression. The results were evaluated by the use of regression equations. Graphical presentations and illustrations were used as necessary. Unconfined compression test results showed that for one-size limestone coarse aggregate, the highest strength values were associated with No. 60 to No. 80 fines in the mix and for one-size rounded gravel coarse aggregate, the highest strength occurred when No. 200 to No. 270 fines were added to the mix. The highest strength was associated with 50 μm flow binder film thickness for all mixes.

scholarly journals Kajian Pengaruh Variasi Material Terhadap Kuat Tekan Beton

2018 ◽  
Vol 3 (1) ◽  
pp. 55
Author(s):  
Suhendra Suhendra
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Concrete Aggregate ◽  
Fine Aggregate ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Coarse Aggregates ◽  
Fine Aggregates ◽  
Laboratory Test Results

Aggregate quality is very influential on the strength of the resulting concrete. Both coarse and fine aggregates have various characteristics identified from laboratory test results. This study aims to examine the use of various aggregates for a quality of concrete. The coarse aggregate and the fine aggregate used are obtained from the nearest location to the work to be performed. The quality of the concrete reviewed is K-125, K-175 and K-225. The coarse aggregates used are 1-2 size (in cm), 2-3 size (in cm) crushed aggregate and coral. The fine aggregates used for each of the coarse aggregates are also different. The results showed that the coral aggregate did not meet the gradations of concrete aggregate. While the fine aggregate does not meet the gradation of concrete aggregate for the three types used. The concrete compressive strength test results show the use of coarse aggregates of 2-3 size of crushed and coarse aggregate of corals giving the average compressive strength value required for all planned concrete strength. While concrete using coarse aggregates of rocks of size 1-2 only meet the specified compressive strength, but does not meet the required compressive strength.Key words: Aggregates, concrete, compressive strength

scholarly journals A Study of the Replacement of Natural Coarse Aggregate by Spherically-Shaped and Crushed Waste Cathode Ray Tube Glass in Concrete

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
N. N. M. Pauzi ◽  
◽  
M. R. Karim ◽  
M. Jamil ◽  
R. Hamid ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Smooth Surface ◽  
Coarse Aggregate ◽  
Control Specimen ◽  
Test Results ◽  
Complete Replacement ◽  
Ordinary Concrete ◽  
Coarse Aggregates ◽  
Optimum Proportion ◽  
Cathode Ray Tube

The aim of this study is to conduct an experimental investigation on the influence of complete replacement of natural coarse aggregate with spherically-shape and crushed waste cathode ray tube (CRT) glass to the aspect of workability, density, and compressive strength of the concrete. After characterizing the glass, a group of concrete mixes was prepared to contain a 40% spherical CRT glass and 60% crushed CRT glass as a complete (100%) replacement of natural coarse aggregates. From a total of 16 types of concrete mixes, the optimum proportion was selected based on its best performance. The test results showed that the use of spherical and crushed glass that possesses a smooth surface, rounded, irregular and elongated shape, and low water absorption affects the workability of concrete. Due to a higher specific gravity of crushed glass, concrete mixes containing CRT glass had a higher density compared to ordinary concrete. Despite the spherical and crushed CRT glass being stronger than gravel, the results revealed a reduction in compressive strength of the concrete. However, using a lower water to binder (w/b) ratio and a higher superplasticizer (SP) dosage, it is found to enhance the compressive strength of 60.97 MPa at 28 days that is lower by 13% than the control specimen. These findings indicate that waste CRT glass in the form of spherical and crushed could be used as an alternative of coarse aggregate that may pave the way for the disposal of hazardous e-waste.

Experimental Research on the Influence of Pebble Aggregate Gradation on Concrete Strength

2013 ◽  
Vol 438-439 ◽  
pp. 179-182
Author(s):  
Xiu Hai Yin ◽  
Ling Lu
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Experimental Research ◽  
Bending Strength ◽  
Coarse Aggregate ◽  
Concrete Strength ◽  
Test Results ◽  
Aggregate Gradation ◽  
Cement Ratio ◽  
Maximal Size

By changing the grading of pebble and water cement ratio, the influence of pebble grading on the compressive strength and flexural strength of concrete is studied at the same pebble content. Test results show that the compression strength and bending strength of concrete decrease with the increasing of the maximal size of coarse aggregate, while the maximal size (Dmax) of pebble aggregate achieves 10mm, 20mm, 40mm and 60mm. And concrete strength decreases significantly when Dmax is 60mm. Meanwhile, the influence of aggregate gradation is obviously with the increase of age time.

Influence of Aggregate Gradation of Coarse Aggregates on Concrete Strength

2012 ◽  
Vol 238 ◽  
pp. 147-149
Author(s):  
Wei Xie ◽  
Deng Kui Yuan ◽  
Shu Shan Li
Keyword(s):  
Size Distribution ◽  
Coarse Aggregate ◽  
Concrete Strength ◽  
Aggregate Size ◽  
Maximum Aggregate Size ◽  
Aggregate Gradation ◽  
Engineering Construction ◽  
Coarse Aggregates ◽  
Constant Content ◽  
Water To Cement Ratio

Concrete is widely used in engineering construction, and studying how to improve the strength of concrete is particularly important. The coarse aggregate is one of the elements in concrete, its property affects the strength of concrete prominently. The effect of coarse aggregate size distribution on the development process of concrete strength was studied, while keeping the constant content of coarse aggregate and altering the size distribution of coarse aggregate and the water to cement ratio. The experimental results show that when the maximum aggregate size is 10mm, 20mm and 30mm respectively, the compressive strength of concrete will be increased, and the flexural strength of concrete will be reduced.

Performance Investigate of Fine Aggregate Size and Content on Asphalt Mastic

2012 ◽  
Vol 424-425 ◽  
pp. 7-10
Author(s):  
Zhong Rong Zhu ◽  
Yong Ye
Keyword(s):  
Compressive Strength ◽  
Volume Fraction ◽  
Aggregate Size ◽  
Fine Aggregate ◽  
Creep Tests ◽  
Volume Fractions ◽  
Asphalt Mastic ◽  
Static Creep ◽  
Fine Aggregates ◽  
Asphalt Mastics

The objective of this study is to investigate and evaluate the compressive strength and creep behavior of fine aggregates on asphalt mastic. The variables that are considered in the study include the size and content of fine aggregates. Eight types of mastic specimens consisting of bitumen with various volume fractions of different kinds of fine aggregates were used. Unixal compression and static creep tests were realized at different loading conditions. The results found that, in general, asphalt mastics made with different aggregate sizes but same volume fraction (64%) have slight difference in compressive strength and creep values. However, those values show significant differences for mastics made with different volume fractions but same aggregate size (between 2.36 and 1.18 mm). Moreover, the asphalt mastic with 64% volume fraction has better deformation resistance.

scholarly journals Modulus of Elasticity of Concretes from Polish and Ukrainian Crushed Aggregates from Igneous Rocks

2014 ◽  
Vol 13 (2) ◽  
pp. 065-072
Author(s):  
Waldemar Budzyński ◽  
Jacek Góra ◽  
Wojciech Piasta ◽  
Tadeusz Turkiewicz
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Coarse Aggregate ◽  
Igneous Rocks ◽  
Test Results ◽  
Coarse Aggregates ◽  
Insignificant Effect ◽  
Grinding Ratio ◽  
Variable Factor ◽  
Standard Values

Test results concern modulus of elasticity and compressive strength of ordinary concretes made of various coarse aggregates from igneous rocks. Test results of some properties of these aggregates (3 crushed granites, 3 basalts, granodiorite, natural gravel) are also considered. The variable factor of the studies is the type of coarse aggregate. According to the analyses of regression and correlation there occurs a significant effect of the aggregate grinding ratio on the modulus of elasticity of concretes contrary to insignificant effect of the compressive strength. The modulus of elasticity of 4 concretes from Polish and Ukrainian granites and basalt aggregates is lower than respective standard values of the modulus.

Sign in / Sign up

Export Citation Format

Share Document