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PREDICTED THE PULL OFF TENSILE STRENGTH OF ASPHALT BINDER USING MODIFIED BBS TEST

PREDICTED THE PULL OFF TENSILE STRENGTH OF ASPHALT BINDER USING MODIFIED BBS TEST

Four types of aggregate brought from various regions of Iraq to study of affinity between asphalt binder and these aggregate; taking into consideration mineral composition in order to measured required force to separate asphalt binder from aggregate. Standard and modified device are manufacture locally to obtained more accurate and realistic experimental result. the Pull Off Tensile Strength of aggregate type S5 brought from Diyala was greater than other types of aggregate for dry and wet test condition and different stub (standard and modified). Also had less Pull off Tensile Strength Losses than other types due to increased present of calcite and high pore size with high stiffness of aggregate.

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Experimental research on concrete strength prediction by Limpet pull-off test in China

Experimental research on concrete strength prediction by Limpet pull-off test in China

Abstract: Using Limpet pull-off test for concrete strength prediction has now been accepted in standards of the UK, North America, Holland and some other countries. For its application in China, pull-off tests were carried out by using the Limpet in this study. Concrete specimens with four different mixtures and strength classes were cast, representing the normal and the high performance concretes commonly used in China. After different ages, the pull-off tensile strength was determined by using the Limpet and the compressive strength was obtained by carrying out cube crushing test using a WE-100 Universal Testing Machine. To reflect the correlation between the pull-off tensile strength and the cube compressive strength, two types of curve were used for regression, and respectively. The regression efficiency of the two curves was compared.

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Analysis of morphology and tensile 
		strength of banana kapok fibres using a scanning electron micrograph (SEM) 
		and pull test equipment

Analysis of morphology and tensile strength of banana kapok fibres using a scanning electron micrograph (SEM) and pull test equipment

Singh et al. (2012) conducted research on bananas and powdered silica fibre reinforced composite materials are developed, the results of this study were obtained scanning electron microscopy showed that the banana fibres are well dispersed in the matrix resin.The addition of banana fibres greatly reduces the yield strength and the addition of silica gives better results from banana fibre reinforced composites but still has a yield strength is greatly reduced. Natural rubber composite lamina reinforced with banana stem fibres by a mixture of NaOH and Na2SO3 has superior tensile strength (Sahari et al., 2015).While the tensile strength, flexural strength, impact strength in woven banana pseudo stem Increased reinforced epoxy composites. Banana fibre composites showed a resilient performance with minimum plastic deformation (Maleque et al., 2011; Pothan et al., 2009; Magdaet al., 2010; Wuryanti, 2013). Giving coagulum in the polyester fibre banana can increase of the composite index, limiting oxygen from 18 to 21% with a reduction in smoke density (Budinsky et al., 2003; Thiruchitrambalam

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Evaluation of Tensile and Interfacial Strength of Coconut Palm Leaf Midrib as a potential Reinforcement for Plastics

Evaluation of Tensile and Interfacial Strength of Coconut Palm Leaf Midrib as a potential Reinforcement for Plastics

Present study shows potential of the midribs of coconut palm leaves as an alternate fiber for reinforcement of plastics and proposes development of a new natural fiber composite. MCL fiber is found lighter than the many commercial fibers and have potential to develop a lighter composite for moderate strength purposes such as furniture, packaging, boards, sheets etc. Tensile strength of the MCL is found competitive with the other natural fibers. Single fiber pull out strength and the critical length strongly recommend for suitable surface treatment of the fiber to enhance the interfacial bonding with hydrophobic polymers. Development of the MCL /plastic composite can also provide a source of employment in the rural areas of tropical countries like India, Shri lanka, Indonesia etc.

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A Comparative of the Study on Mechanical Strength Properties by Replacing Cement with Rice Husk Ash

A Comparative of the Study on Mechanical Strength Properties by Replacing Cement with Rice Husk Ash

2) Split Tensile Strength of Cylinders: Determining the tensile strength of the concrete member is necessary to determine the load at which the concrete member may break. Cracks are a form of tension failure. Split tensile strength is an indirect method for finding the tensile strength of concrete. The tensile splitting strength and 18 cylinders of a 150 mm diameter and 300 mm height cylinder were tested. The test was carried out by placing a cylindrical sample horizontally between the loading surfaces of the compression tester, and applying a load until the cylinder failed.

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Experimental Study on Strength of Concrete with Addition of Chopped Glass Fiber

Experimental Study on Strength of Concrete with Addition of Chopped Glass Fiber

Fiber reinforced concrete (FRC), a relatively new material, is a concrete made primarily of hydraulic cements, aggregates and discrete reinforcing fibers [1]. Glass fiber reinforced concrete is one of the most versatile building materials available to architects and engineers [4]. This concrete is composed principally of cement, sand and alkali resistant glass fibers. GRC is a thin, high strength concrete with many applications in construction [4]. Fiber in the cement based matrix acts as crack arrester, which restricts the growth of flaws in the matrix, preventing these from enlarging under load into cracks, which eventually cause failure [9]. Prevention of propagation of cracks originating from internal flaws can result in improvement in static and dynamic properties of the matrix [9]. A major advantage of using fiber reinforced concrete besides reducing permeability and increasing fatigue strength is that fibers addition improves the toughness or residual load carrying ability after the first crack, this concrete is known as glass fiber reinforced concrete (GFRC) [11]. Present investigation was conducted to study the effect of addition of glass fiber on the compressive strength, split tensile strength and tensile strength (flexural strength) properties of the concrete.

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Laboratory Evaluation of Warm Mix Asphalt

Laboratory Evaluation of Warm Mix Asphalt

Over the last thirty years, road traffic has luxuriate significantly and loading is progressively getting cruddy due to the introduction of newer and ancillary big- wheel trucks with heavier and wider bodies in India. This study emphasizes on the mix design considerations. In this study, bituminous concrete grade-1 (BC-1) and Zycotherm additive on the warm mix asphalt paving mix is used to achieve sufficient stability, durability and to satisfy requirements. It is about the effect of Zycotherm additives on the Marshall Properties, Indirect tensile strength, Tensile strength ratio and retained stability test of warm mix asphalt. The specification such as Bulk density, Volume of air voids, Voids in Mineral Aggregates, Voids Filled with Bitumen, Stability and Flow, Indirect Tensile Strength, Tensile Strength Ratio and Retained Stability are determined. It is taken up with the objectives of to know the effect of Zycotherm on the properties of bituminous mix. The different percentage of Zycotherm additives are added in bitumen and bituminous mix, and tested their viscosity test, penetration values, softening points, ductility test at low temperatures are determined and an attempt is made to compare the Marshall properties of WMA produced with the chemical additive, Zycotherm and HMA for Bituminous Concrete (BC) Grade 1. The results of this study showed that the emissions are significantly reduced during the production and placement of WMA mixtures as compared to the control HMA mixture. The modified bitumen for warm mix asphalt indicated high consistency and lower softening point than ordinary bitumen. Warm mix asphalt mixtures also showed better results in term of strength, stiffness and lower rate of permanent deformation.

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Tensile Strength of the Eggshell Membranes

Tensile Strength of the Eggshell Membranes

Experimental records force-displacement were converted to the dependence of stress, , on the strain, , using of Eqs. in Mehnet Ak and Gunasekaran (1997). The maximum of the stress corresponds to the moment of eggshell membrane fracture. This quantity is denoted as the ultimate tensile strength (UTS). The corresponding strain represents the fracture strain  f . The next parameter which describes the fracture behaviour of the eggshell membrane is the fracture toughness. This quantity is expressed as the energy absorbed by the eggshell membrane up to rupture point per unit volume of the membrane and was determined using the following formula (Polat et al., 2007):

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The Tensile Strength of Hooked Brick

The Tensile Strength of Hooked Brick

This research method is visual observation and measurement of tensile strength from the bricks. Visual observations covers (1) the color produced, (2) water absorption (3) swell shrinkage. The data obtained from visual observations are analyzed and compared one each other. Meanwhile, in measurement of tensile strength from brick, this study will attempt to make the two samples groups of bricks. The first group is the brick with added material filter cake and the second one is the ordinary brick . Then , the two groups will analyze based on compressive strength.

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Effect of Cold Quenching On Mechanical Properties of Al7075-Albite Particulate Composite

Effect of Cold Quenching On Mechanical Properties of Al7075-Albite Particulate Composite

Abstract-In the present work, an attempt is made to study the mechanical properties of Al7075-Albite particulate composite fabricated by stir casting method by varying the weight percentage of Albite particulates from 0wt%, to 10wt% in steps of 2wt%. The Al7075 alloy and Al7075-albite particulate composites were heat treated at solutionizing temperature of 470° C for 2 hours then quenching in ice media and artificial ageing for 6 hours at 120° C. The specimens were prepared according to ASTM test standards. The microstructure analysis reveals that uniform distribution of Albite particulates in the Al7075 matrix alloy and there was signi ficant improvement in ultimate tensile strength, compressive strength and hardness properties of the composite as compared with Al7075 alloy.

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Statistical approaches in tensile tests of bond strength

Statistical approaches in tensile tests of bond strength

Specimen preparation: Forty-eight bovine teeth were selected. All roots were sectioned with diamond disk (Dremel, Breda, Holland) approximately 2 mm below the cement- enamel junction. The obtained crowns were flattened and polished with abrasive paper in a polishing machine (DP-10, Panambra, São Paulo-SP, Brazil) under water cooling, to expose the dentin area and divided into 2 groups/N=24: macro- tensile and micro-tensile. On the lingual surface of the crowns, an opening was made at the cingulum with a 1016 HL spherical drill (KG Sorensen, Rio de Janeiro, RJ, Brazil) to permit the entrance of a thickness gauge (Golgran, São Caetano do Sul, SP, Brazil) in order to be measure and standardize the thickness of dentin in 2 mm. Then, the hole of the lingual surface was closed with utility wax and the teeth crowns embedded in colorless self-polymerized acrylic resin (Jet- Articles Odontológicos Clássicos LTDA., São Paulo-SP) using an industrial silicone matrix (Rhodorsil - Classical Dental Articles, Campo Limpo Paulista, SP, Brazil). Dentin was etched with 37% phosphoric-acid (Condac, FGM, Joinvile, Santa Catarina, Brazil) for 15s and washed with water. Adhesive (Adper Single Bond 2, 3M/ESPE, St. Paul, Mn, USA) was applied and light-cured (XL3000, 3M/ESPE, St. Paul, MN-USA - power density of 600mW/cm 2 ), according to manufacturer´s instructions. For Ma, the resin-composite was inserted using a Teflon mold to produce a truncated-cone shaped specimen with a 2mm narrower diameter base (bonding interface), and a 4mm wider base diameter, with a length of 4mm. Specimens were stored for 24h. For Mi, the resin composite (Z350 XT, 3M/ESPE, St. Paul, Mn, USA) was

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An Expermental Study on Self Compacting Concrete by Replacing by Marble Sludge Powder and Quarry Rock Dust

An Expermental Study on Self Compacting Concrete by Replacing by Marble Sludge Powder and Quarry Rock Dust

 The partial replacement of fine aggregate with marble sludge and Crusher dust gives an excellent result in strength aspect and quality aspect. It induced higher compressive strength, higher splitting tensile strength as compared to ordinary SCC.

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Analysis of Behaviour of Rice Husk Ash Cement Concrete on Addition of Polypropylene Fiber

Analysis of Behaviour of Rice Husk Ash Cement Concrete on Addition of Polypropylene Fiber

very challenging and difficult circumstances, where a great emphasis is on sustainability. Rice husk ash and polypropylene fiber, by-products of rice mill and textile industry simultaneously, can enhance behaviour of concrete significantly .In this experimental work the objective was to study the effect of rice husk and polypropylene on compressive and split tensile strength of M20 concrete. Rice husk ash and polypropylene have been mixed with concrete in combination in different proportions. Rice husk has been used in 2.5%, 5% &10% by weight of cement. Polypropylene fiber content varies from 0%, 0.25%, 0.5% &0.75% by weight of concrete. We can see the maximum strength value by plotting the test result of cube for compressive strength test and cylinder for split tensile strength test for 7days and 28 days. At 10% rice husk and 0.5% polypropylene 7 days peak compressive strength has been achieved which is 22.6% higher than controlled concrete. At 5% rice husk and 0.5% polypropylene fiber 7 days peak split tensile strength has been achieved which is 53.57% higher than controlled concrete. At 10% rice husk ash and 0.5% polypropylene fiber 28 days peak compressive strength has been achieved which is 54.61% higher than controlled concrete. At 5% rice husk and 0.5% polypropylene fiber 28 days peak split tensile strength has been achieved which is 31.34% higher than controlled concrete.

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Effect of Silicon content on the Mechanical Properties of Aluminum Alloy

Effect of Silicon content on the Mechanical Properties of Aluminum Alloy

automotive industries. This is particularly due to the real need to weight saving for more reduction of fuel consumption. The typical alloying elements are copper, magnesium, manganese, silicon, and zinc. Surfaces of aluminium alloys have a brilliant lustre in dry environment due to the formation of a shielding layer of aluminium oxide. Aluminium alloys of the 4xxx, 5xxx and 6xxx series, containing major elemental additives of Mg and Si, are now being used to replace steel panels in various automobile industries. In this work we are interested to investigate the mechanical properties of aluminium alloy by varying the percentage of silicon. The results showed that with the increasing of silicon content the solidification time increased, as also a decreasing the liquids temperature. The tensile strength of aluminium alloy is increased with increased silicon content up to 6 %.

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Retarding premature reflective cracking in bituminous pavement using geosynthetics.

Retarding premature reflective cracking in bituminous pavement using geosynthetics.

Geotextiles can be simply defined as „a textile material used in a soil (geo) environment‟ and include woven, non-woven polymeric materials and natural materials, such as jute, manufactured using textile processes. Geotextiles made using polypropylene or polyester are most common. Polypropylene begins to melt at a temperature of about 325°F. Therefore, when using polypropylene products, the temperature of the paving mixture should not exceed 325°F when it contacts the geosynthetic. Needle Punched Woven Geotextile (Fig 1) was collected from Gorantla Geosynthetic Private Limited in Chennai. The fabric is made up of tangled threads of 100% polypropylene, which give it superior strength to stand up to the stresses of construction and installation and is good resistance to UV and natural degradation. The properties of the Needle Punched Polyester Geotextiles is shown in Table 3

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Retarding premature reflective cracking in bituminous pavement using geosynthetics

Retarding premature reflective cracking in bituminous pavement using geosynthetics

The tensile strength ratio of the mix was found to be satisfying the specified requirements. As per MoRTH 2012, the minimum tensile strength ratio required for the mix with bitumen is 80%. The test results of various mixes without Geotextiles and with Geotextiles placed at 1/3 rd , half and 3/4 th depth are given in Table5. Mix with geotextile placed at 1/3 rd depth showed more tensile resistance for both wet and dry condition and hence the tensile strength ratio obtained was 84% hence providing a good resistance to moisture damage and creep. The cracking behaviour of the mix with and without geotextiles is as shown in Fig 3(a) and Fig 3(b).

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INTELLIGENT BRAKING SYSTEM USING ULTRASONIC SENSOR

INTELLIGENT BRAKING SYSTEM USING ULTRASONIC SENSOR

A comprehensive analysis carry out for three trial value of tensile strength and their average. Here tensile strength depend upon three factors-pressure, amplitude and weld time. We plot three different graph ,in first graph we see tensile strength at different pressure. Here tensile strength vary from 172.80MPa to 188.79MPa and pressure vary from 1.4 bar to 1.8 bar.In second graph, we see tensile strength at different amplitude.Here tensile strength vary from 172.80MPa to 188.79MPa and amplitude vary from 22µm to 28µm.In third graph ,we see variation of tensile strength at different weld time. Here minimum value of tensile strength is 172.80MPa and maximum value is 188.79MPa and weld time vary from 0.40second to 0.50second.

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Analysis of Behaviour of Rice Husk Ash Cement Concrete on Addition of Polypropylene Fiber

Analysis of Behaviour of Rice Husk Ash Cement Concrete on Addition of Polypropylene Fiber

containing 0.25% Propylene fiber + 2.5% rice husk ash, compressive strength was little higher than controlled concrete. But further increase in rice husk ash percentage compressive strength decreased. For 0.5% Polypropylene fiber + 2.5% rice husk ash compressive strength was little higher than controlled concrete. But with increase in rice husk ash, compressive strength also increased. For 0.75% polypropylene fiber + 2.5% rice husk ash compressive strength was lesser than controlled concrete. But with increase in rice husk ash compressive strength also increased

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Use of Polymer Composite in Bridge Rehabilitation

Use of Polymer Composite in Bridge Rehabilitation

Standards and codes for FRP materials and their use in construction are either published or currently being written in Japan, Canada, the United States, and Europe. These official documents are typically similar in format to conventional standards and codes, which should ease their adoption by governing agencies and organizations. The most significant mechanical differences between FRP materials and conventional metallic materials are the higher strength, lower stiffness, and linear-elastic behavior to failure of the former. Other differences such as the thermal expansion coefficient, moisture absorption, and heat and fire resistance need to be considered as well.

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An Expermental Study on Self Compacting Concrete by Replacing by Marble Sludge Powder and Quarry Rock Dust

An Expermental Study on Self Compacting Concrete by Replacing by Marble Sludge Powder and Quarry Rock Dust

 The partial replacement of fine aggregate with marble sludge and Crusher dust gives an excellent result in strength aspect and quality aspect. It induced higher compressive strength, higher splitting tensile strength as compared to ordinary SCC.

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