Analysis of Increase Reason on AC-13 Asphalt Mixtures Voids

2014 ◽  
Vol 1065-1069 ◽  
pp. 1732-1738
Author(s):  
Shuai Tuan Tian ◽  
Song Ye ◽  
Zhen Yu Zhao
Keyword(s):  
Bulk Density ◽  
Void Ratio ◽  
Small Difference ◽  
Asphalt Mixtures ◽  
Fine Aggregate ◽  
Air Voids ◽  
Fine Material ◽  
Fine Aggregates ◽  
Designing Method ◽  
Molding Methods

We make specimens with different gradation types ,different fine aggregates , different molding methods, we calculate their air voids , we analyze the cause of increased porosity of mixture from different aspects. The results show that when we use the same aggregate and the same gradation, the air voids show small difference from the designing method of Gyratory Compactor and Marshall ; when we use the same molding methods and and gradations and different fine aggregates to form specimens, the void ratio of basalt fine material is larger,the the void ratio of limestone fine material is smaller; The main reason is the bulk density of basalt fine aggregate is larger,and it is not easy to compaction.

scholarly journals Experimental Study on Strength of Pervious Concrete by Using Fine Aggregate

2021 ◽  
Vol 9 (12) ◽  
pp. 895-897
Author(s):  
Atif Jawed
Keyword(s):  
Compressive Strength ◽  
Void Ratio ◽  
Rice Husk Ash ◽  
Pervious Concrete ◽  
Void Content ◽  
Fine Aggregate ◽  
Coarse Aggregates ◽  
Fine Aggregates ◽  
Flow Through ◽  
Concrete Matrix

Abstract: Pervious concrete is a special type of concrete, which consists of cement, coarse aggregates, water and if required and other cementations materials. As there are no fine aggregates used in the concrete matrix, the void content is more which allows the water to flow through its bodyThe main aim of this project was to improve the compressive strength characteristics of pervious concrete. But it can be noted that with increase in compressive strength the void ratio decreases. Hence, the improvement of strength should not affect the porosity property because it is the property which serves its purpose. In this investigation work the compressive strength of pervious concrete is increased by a maximum of 18.26% for 28 days when 8% fine aggregates were added to standard pervious concrete Keywords: W/C ratio, pervious Concrete, sugarcane bagasse’s ash, rice husk ash compressive strength, fine aggregates

scholarly journals Rheological and Interaction Analysis of Asphalt Binder, Mastic and Mortar

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 128 ◽  
Author(s):  
Meng Chen ◽  
Barugahare Javilla ◽  
Wei Hong ◽  
Changluan Pan ◽  
Martin Riara ◽  
...  
Keyword(s):  
Phase Change ◽  
Interaction Analysis ◽  
Asphalt Binder ◽  
Asphalt Mixtures ◽  
Physical Interaction ◽  
Fine Aggregate ◽  
Mineral Filler ◽  
Asphalt Mastic ◽  
Fine Aggregates ◽  
Asphalt Mortar

This paper investigated the rheological properties of asphalt binder, asphalt mastic and asphalt mortar and the interaction between asphalt binder, mineral filler and fine aggregates. Asphalt binder, mastic and mortar can be regarded as the binding phase at different scales in asphalt concrete. Asphalt mastic is a blend of asphalt binder and mineral filler smaller than 0.075 mm while asphalt mortar consists of asphalt binder, mineral filler and fine aggregate smaller than 2.36 mm. The material compositions of mastic and mortar were determined from the commonly used asphalt mixtures. Dynamic shear rheometer was used to conduct rheological analysis on asphalt binder, mastic and mortar. The obtained test data on complex modulus and phase angle were used for the construction of rheological master curves and the investigation of asphalt-filler/aggregate interaction. Test results indicated a modulus increase of three- to five-fold with the addition of filler and a further increase of one to two orders of magnitude with cumulative addition of fine aggregates into asphalt binder. Fine aggregates resulted in a phase change for mortar at high temperatures and low frequencies. The filler had stronger physical interaction than fine aggregate with an interaction parameter of 1.8–2.8 and 1.15–1.35 respectively. Specific area could enhance asphalt-filler interaction. The mastic and mortar modulus can be well predicted based on asphalt binder modulus by using particle filling effect. Asphalt mortar had a significant modulus reinforcement and phase change and thus could be the closest subscale in terms of performance to that of asphalt mixtures. It could be a vital scale that bridges the gap between asphalt binder and asphalt mixtures in multiscale performance analysis.

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).

Evaluation of Job-Mix Formula Tolerances as Related to Asphalt Mixtures Properties

2018 ◽  
Vol 24 (5) ◽  
pp. 124
Author(s):  
Mohammed Qadir Ismael ◽  
Reem Fouad Ahmed Al-Harjan
Keyword(s):  
Evaluation Process ◽  
Maximum Size ◽  
Asphalt Mixtures ◽  
Fine Aggregate ◽  
Compressive Test ◽  
Aggregate Gradation ◽  
Air Voids ◽  
Asphalt Cement ◽  
Marshall Test ◽  
Asphalt Content

The current Iraqi standard specifications for roads and bridges allowed the prepared Job-Mix Formula for asphalt mixtures to witness some tolerances with regard to the following: coarse aggregate gradation by ± 6.0 %, fine aggregate gradation by ± 4.0 %, filler gradation by ± 2.0 %, asphalt cement content by ± 0.3 % and mixing temperature by ± 15 oC. The objective of this work is to evaluate the behavior of asphalt mixtures prepared by different aggregates gradations (12.5 mm nominal maximum size) that fabricated by several asphalt contents (40-50 grade) and various mixing temperature. All the tolerances specified in the specifications are taken into account, furthermore, the zones beyond these tolerances are also observed. The evaluation process is illustrated by volumetric properties such as density, air voids, voids in mineral aggregate and voids filled with asphalt. Marshall test is carried out to find stability and flow values. The resistance to moisture effect is investigated by conducting the compressive test for dry and water immersed conditions to find the index of retained strength. The experimental results supported the recommendations to increase tolerances of coarse and fine aggregate gradations to ± 7.0 % and         ± 5.0 % respectively. The optimum asphalt content tolerance can be increased to ± 0.5 %. The tolerances of filler gradation and mixing temperature are preferable to keep their current values.  

scholarly journals A Suitability Study of Using Crushed Fluorescent Lamp Waste as Fine Aggregates

2021 ◽  
Author(s):  
Hanna C. Joshy ◽  
Mansoor Ali K ◽  
Rameez Z ◽  
Sarath S ◽  
Ramaswamy K. P
Keyword(s):  
Compressive Strength ◽  
Bulk Density ◽  
Negative Impact ◽  
Fine Aggregate ◽  
Fluorescent Lamp ◽  
Fluorescent Lamps ◽  
Adverse Impacts ◽  
Fine Aggregates ◽  
Electrical Devices ◽  
Extreme Care

Fluorescent lamp wastes are one of the discarded electrical devices. These lamp wastes pose serious health concerns, and require extreme care in its disposal to avoid any adverse impacts. Also, with the widespread use of energy efficient LED lamps for lighting purposes, environmental concerns related to disposal of used mercury containing fluorescent lamps have become progressively important. This paper explores the possibility of replacement of fine aggregates in mortar with different proportions of fluorescent lamp wastes in order to find the optimum percentage of replacement to get better properties. Fluorescent lamp wastes were collected and crushed to the grading of fine aggregates. Compressive strength and bulk density of mortar cubes with 0%, 25%, 50%, 75% and 100% replacement of fine aggregates with fluorescent lamp wastes were evaluated after 7 days of initial curing. The compressive strength and bulk density of mortar was found to be decreasing with increasing percentage of lamp waste added. The replacement of fine aggregate by 25% lamp waste has greater strength compared to other proportions. Bulk density was found to be lesser at higher replacement levels and can be tried in producing light weight mortar. The utilization of lamp waste in mortar/concrete is a noble attempt in reducing the negative impact of lamp wastes on the environment

Analysis of Influence of Fine Aggregate on Void Ratio of Asphalt Mixture

2014 ◽  
Vol 587-589 ◽  
pp. 1079-1083
Author(s):  
Guan Jing
Keyword(s):  
Bulk Density ◽  
Void Ratio ◽  
Coarse Aggregate ◽  
Asphalt Mixture ◽  
Fine Aggregate ◽  
Test Results ◽  
Regulatory Requirements ◽  
Aggregate Gradation

Using molding with different fine aggregate, gradation, asphalt, aggregate forming and forming method, and calculate the sample porosity. The test results show that: The basalt coarse-fine aggregate molding, specimen void ratio was larger, are beyond the regulatory requirements; basalt coarse aggregate molding and limestone fine aggregate molding, specimen porosity is small, can meet the requirements of specification range. The main reason is that the basalt thin bulk density is big, and its not easy compaction.

Analysis of Increase Reason on AC-13 Asphalt Mixtures Voids

2013 ◽  
Vol 361-363 ◽  
pp. 1838-1841
Author(s):  
Li Ping ◽  
Jia Xi Deng ◽  
Shuai Tuan Tian ◽  
Wang Bin
Keyword(s):  
Asphalt Mixtures ◽  
Fine Aggregates ◽  
Molding Methods

Using different gradations and different fine aggregates and different molding methods for molding specimens, and calculates the sample porosity, and analyzes the cause of increased porosity of mixture from different aspects. The results show that: the same aggregate and the same gradation, the use of Gyratory Compactor and the Marshall designed method form the small different porosity specimen;

Effects of Crushed Glass Waste as a Fine Aggregate on Properties of Hot Asphalt Mixture

2021 ◽  
Vol 28 (3) ◽  
pp. 129-145
Author(s):  
Ahmed Almuhmdi ◽  
 Abdulbasit Muhmood ◽  
Abdulhakim Salih
Keyword(s):  
Tensile Strength ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Partial Substitution ◽  
Fine Aggregate ◽  
Glass Waste ◽  
Air Voids ◽  
Binder Layer ◽  
Indirect Tensile ◽  
Marshall Stability

The recycling of waste requires large areas; besides recycling wastes to their origin is often economically and environmentally costly. Glass is considered as a solid waste that is difficult to dispose of; it doesn't degrade nor burn. Since glass is a silicic substance with similar properties to aggregates, it can be recycled in asphalt mixtures. This research aims to determine optimum binder content (OBC) of conventional hot asphalt mixture (HMA), (control mixture), and investigate the effect of crushed glass waste (CGW), on its properties. In this work, several percentages of CGW (10%, 15%, 20%, and 25%) have been used as a partial substitution for the weight of fraction size 2.36-0.075mm of natural aggregate to prepare glass-contained asphalt mixtures and compare their properties with the control mixture. Mix design by Marshall method was used, and the properties according to Iraqi standards (SORB/R9,2003), for binder layer, were found, as well as conducting of Retained Marshall stability (RMS), indirect tensile strength (IDT), and tensile strength ratio (TSR), tests on mixtures, as performance tests. The results showed that the OBC of the control mixture was 5% wt., and the Marshall stability and flow values of glass-contained asphalt mixtures were oscillating around the values of the control mixture. The air voids, voids in mineral aggregate, and bulk density were reduced regularly as CGW increased. Also, it was observed from the results that the glass-contained mixtures have good performance properties. However, all results conformed to the standards (SORB/R9, 2003). So, the incorporation of CGW in HMA for the binder layer is feasible.

Gypsum Mortars with Different Types of Aggregates: Design and Properties

2016 ◽  
Vol 722 ◽  
pp. 337-342 ◽  
Author(s):  
Magdaléna Doleželová ◽  
Jitka Krejsová ◽  
Alena Vimmrová
Keyword(s):  
Bulk Density ◽  
Setting Time ◽  
Design Procedure ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Fine Aggregates ◽  
Different Types ◽  
Physical Tests ◽  
Different Origin

The influence of different types of fine aggregates on behavior and properties of gypsum mortars was investigated. The design procedure and results of some basic physical tests are described. The composition of mixtures was designed in order to minimalize all other impacts than type of aggregate. Four types of fine aggregates of different origin, with different shape and surface of particles were used. The presence of fine aggregate in gypsum increases the bulk density and reduces setting time. Crushed stone with angular rough particles worsen workability and reduce setting time more significantly than aggregates with round and smooth particles.

Effect of Copper Slag as a Fine Aggregate on the Durability Characteristics of High-Performance Concrete (HPC) Containing Silica Fume

2020 ◽  
Vol 07 (02) ◽  
pp. 1-10
Author(s):  
Rizwan Ahmad Khan ◽  
Keyword(s):  
Silica Fume ◽  
High Performance ◽  
High Performance Concrete ◽  
Copper Slag ◽  
Chloride Penetration ◽  
Interfacial Transition Zone ◽  
Fine Aggregate ◽  
Fresh Properties ◽  
Fine Aggregates ◽  
Effect Of Copper

This paper investigates the fresh and durability properties of the high-performance concrete by replacing cement with 15% Silica fume and simultaneously replacing fine aggregates with 25%, 50%, 75% and 100% copper slag at w/b ratio of 0.23. Five mixes were analysed and compared with the standard concrete mix. Fresh properties show an increase in the slump with the increase in the quantity of copper slag to the mix. Sorptivity, chloride penetration, UPV and carbonation results were very encouraging at 50% copper slag replacement levels. Microstructure analysis of these mixes shows the emergence of C-S-H gel for nearly all mixes indicating densification of the interfacial transition zone of the concrete.

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