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Study on Indirect Tensile Strength of Plastic Waste Bituminous Concrete for Road Construction

and bituminous materials - Determination of specific gravity [l6]. IS 1208: 1978 Methods of testing tar and bituminous material - Determination of ductility [17]. ASTM D 6931 (2007), “ Indirect Tensile (IDT) Strength for Bituminous Mixtures ”, American Society for Testing and Materials, Philadelphia.

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Preliminary Studies to Use Textile Fibers Obtained from Recycled Tires to Reinforce Asphalt Mixtures

from recycled tire as reinforcement in hot mix asphalt” . Texas Transportation Institute, report SWUTC/06/167453-1, 2006 . [7] EN 12697-12:2009, Bituminous mixtures - Test methods for hot mix asphalt. Part 12: Determination of the water sensitivity of bituminous specimens . 2009 . [8] EN 12697-23:2003, Bituminous mixtures - Test methods for hot mix asphalt. Part 23: Determination of the indirect tensile strength of bituminous specimens . 2003 . [9] LEE, S.J., RUST, J.P.; HAMOUDA, H.; KIM, R.; BORDEN, R.H. “ Fatigue Cracking Resistance of Fiber

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Performance Characteristics of Fiber Modified Asphalt Concrete Mixes

Modulus of Asphalt concrete Mixture by Indirect Tension Test”. Busching H.W. and J.D. Antrim 1968 “Fiber Reinforcement of Asphalt Mixtures.” Journal of the Association of Asphalt Paving Technologists, Vol. 37, 1968 p 629-656. Decoene, Y. 1990 “Contribution of cellulose fibers to the performance of porous asphalts”, Transportation Research Record n 1265, 1990, p. 82-88. Imran Hafeez & Mumtaz Ahmed Kamal, 2011 “Repeated Load Permanent Deformation Behavior of Mixes With and Without Modified Bitumen”, Mehran University

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Alternative Micro-Milled Binders in Cold Recycling Technologies

Abstract

In addition to bituminous binders (bituminous emulsion, foamed bitumen), hydraulic binders are applied in cold recycling technologies to increase the strength of a final structural layer as well as to increase its resistance to water and frost impacts. This paper deals with the use of energy by-products from fluidized bed coal combustion and mineral waste and their modification into reactive material with the potential of replacing commonly used hydraulic binders. The increase in the reactive potential takes place through a high-speed milling process where the mechanical-chemical activation of the material takes place. This process is associated with the refinement of the material, a higher proportion of micro and nanoparticles, an increased surface area, opening of particles, etc. The material treated exhibits binding properties, and it can be used as an active filler that allows for the partial or complete substitution of hydraulic binders. The experimental part is focused on the application of alternative binders to cold recycling mixtures and their assessment according to valid technical regulations, i.e., an assessment of their indirect tensile strength and water susceptibility as well as compressive strength and resistance to the effects of water and frost.

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Economical Reactive Powder Concrete Cast Using Available Materials in North Sinai, Egypt

References 1. Xiaoa, J., Schneiderb, H., Donneckeb, C., Konigb G.: Wedge Splitting Test on Fracture Behaviour of Ultra High Strength Concrete. Construction and Building Materials. 18, 359-365 (2004). 2. Prabha, S.L., Dattatreya, J.K., Neelamegam, M., Seshagirirao, M.V.: Study on Stress-Strain Properties of Reactive Powder Concrete under Uniaxial Compression, International Journal of Engineering Science and Technology. 2 (11), 6408-6416 (2010). 3. Washer, G., Fuchs, P., Graybeal, B.: Elastic Properties of

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Triaxial Compression Testing of Multicomponent Geomaterials from Quartz-Poor (Syenitic) Systems

Abstract

This paper focuses on mafic microgranular enclaves enclosed in quartz-poor igneous rocks and their effect on strength properties of the rock massif. The study examines host rock–enclave multicomponent geomaterials from enclave-bearing syenitic rocks from the Třebíč Massif exposed in the Královec quarry near Jaroměřice nad Rokytnou in the Czech Republic. A series of laboratory tests were performed to describe strength properties of individual constituents of the multicomponent geomaterials. We mainly focused on triaxial compression tests, however, rebound hardness, uniaxial compressive strength and indirect tensile strength were determined as well. The obtained results indicate that enclaves and even the contact zones between the enclaves and host rocks do not have any negative influence on the rock strength. In contrast, enclaves represent “stress concentrators” within such multicomponent systems. Strength properties of various multicomponent geomaterials are practically an unexplored topic in the field of rocks mechanics and future studies are needed to establish a robust database describing the behaviour of such geocomposites.

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Testing of beveled crimp connections made on a prototype stand

car-body sheets using clinching process with various thickness and mechanical property arrangements Archives of Civil and Mechanical Engineering,(2011),11, 1, pp. 135-148. [9] J. Mucha, L. Kaščák, E. Spišák,The Experimental Analysis of Forming and Strength of Clinch Riveting Sheet Metal Joint Made of Different Materials, Advances in Mechanical Engineering, (2013),5, pp. 185-196. [10] N. Wrobel, M. Rejek, G. Krolczyk, S. Hloch, Testing of Tight Crimped Joint Made on a Prototype Stand, Lecture Notes in Mechanical Engineering, (2017), pp

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Laboratory Trials Of Cold Recycled Foamed Bitumen Asphalt: Raf Waddington

, Argentina , (1). British Board of Agreement, Guidelines Document for assessment and certification of thin surfacing system for highways, App. A13, BBA, HAPAS SG3. CIRIA, 1999. The reclaimed and recycled construction materials handbook , Cooper, K.E. & Pell, P.S., 1974. The effect of mix variables on the fatigue strength of bituminous materials , County Surveyors Society Guidance Note, 2008. Road Materials Containing Tar., pp.1–10. Jitareekul, P., 2009. An Investigation into Cold In-Place Recycling of Asphalt Pavement . University of

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MECHANICAL PERFORMANCE OF BITUMINOUS CONCRETE INCORPORATING STEEL SLAG WITH NATURAL AGGREGATE

ABSTRACT

India has world’s second largest road network in terms of length with a total road length of 4.24 million km. Hot mix bituminous pavement contributes around 50% road length to this vast road network. Large scale highway construction in India, emanating from rapid development, has caused massive depletion of scarce natural aggregate. This paper addresses this problem by investigating the influences of the utilization of steel slag as a coarse aggregate on the properties of hot mix bituminous concrete. Physical characteristics of bituminous mix ingredients i.e natural aggregate, steel slag aggregate and bituminous binder were determined to find out their compliance with Ministry of Road Transport and Highway Specification for Road and Bridge Works in India. Mechanical characteristics of bituminous mixes i.e Unmodified (having natural aggregate) and Modified (having steel slag as coarse aggregate) were determined using Marshall Method of mix design.

Unmodified and Modified mixes were subjected to an array of performance tests to check out the suitability of steel slag aggregates for the preparation of high performance bituminous concrete mix. The performance tests includes, retained Marshall Stability, indirect tensile strength, static creep test, wheel-tracking test and resilient modulus test. The laboratory study confirmed the improvement in various mechanical properties of steel slag modified mixes besides reduction in temperature and moisture susceptibility.

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COMPARISON STUDY BETWEEN LIME APPLICATION METHODS ON HMA ASPHALT CONCRETE IN IRAQ

ABSTRACT

Iraq has been experiencing tremendous development in the national infrastructure road network over the last decade. Iraqi economic growth in rural areas has been triggered by good and safe roads and a good highways network system. Studies have shown that climate, traffic conditions, characteristics of the asphalt binder and the aggregate are the main factors that can contribute to premature pavement failures. The ability of hydrated lime to improve the fatigue and rutting resistance of Hot Mix Asphalt (HMA) as well as moisture sensitivity, has led to observed improvement in the field of lime modified HMA pavements, and significant decreases in maintenance and repair costs of the highway network. In this study, the mechanistic properties of asphalt concrete mixes modified with hydrated lime as a partial replacement for limestone dust mineral filler were evaluated. Four replacement rates were used; 1, 1.5, 2, and 3 percent by weight of aggregate beside two kinds of addition methods, namely dry and wet. Asphalt concrete mixes were prepared at their optimum asphalt content and then tested to evaluate their engineering properties which include moisture damage, resilient modulus, and permanent deformation and fatigue characteristics. These properties have been evaluated using indirect tensile strength, uniaxial repeated loading and repeated flexural beam tests. The experimental results, in general, showed that the mixes modified with hydrated lime were found to have improved fatigue and permanent deformation characteristics, also showing lower moisture susceptibility and higher resilient modulus. The use of 1.5 percent of hydrated lime in the wet addition method as a replacement for limestone dust mineral filler has shown a significant improvement in asphalt concrete behavior and has added to the local knowledge the possibility of producing more durable mixtures with higher resistance to distress.

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