Experimental Study on the Anti-Cracking Performance for Geosynthetics Overlay

2013 ◽  
Vol 838-841 ◽  
pp. 1295-1298
Author(s):  
Ya Zhen Sun ◽  
Li Bao Wang ◽  
Bao Yang Yu
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Fatigue Test ◽  
Mechanical Performance ◽  
Asphalt Mixture ◽  
Bituminous Mixture ◽  
Bituminous Mixtures ◽  
Cracking Performance

In order to study anti-cracking performance for geosynthetics, the splitting and fatigue test of bituminous mixtures with geosynthetics and without geosythetics are carried out. The mechanical performance for tensile strength and elastic modulus of asphalt mixture are obtained through two tests. The tensile strength and elastic modulus of bituminous mixture are increased by 14.9% and 54.9% respectively. Through adding the geosynthetics overlay to achieve the purpose of retarding the development of cracks in the pavement.

scholarly journals Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3306 ◽  
Author(s):  
Marta Skaf ◽  
Emiliano Pasquini ◽  
Víctor Revilla-Cuesta ◽  
Vanesa Ortega-López
Keyword(s):  
Mechanical Performance ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Electric Steelmaking ◽  
Porous Asphalt ◽  
Bituminous Mixtures ◽  
Abrasion Loss ◽  
Water Sensitivity ◽  
Electric Arc Furnace Slag ◽  
Furnace Slag

Electric arc furnace slag (EAFS) and ladle furnace slag (LFS) are by-products of the electric steelmaking sector with suitable properties for use in bituminous mixtures as both coarse and fine aggregates, respectively. In this research, the production of a porous asphalt mixture with an aggregate skeleton consisting exclusively of electric steelmaking slags (using neither natural aggregates nor fillers) is explored. The test program examines the asphalt mixtures in terms of their mechanical performance (abrasion loss and indirect tensile strength), durability (cold abrasion loss, aging, and long-term behavior), water sensitivity, skid and rutting resistance, and permeability. The results of the slag-mixes are compared with a standard mix, manufactured with siliceous aggregates and cement as filler. The porous mixes manufactured with the slags provided similar results to the conventional standard mixtures. Some issues were noted in relation to compaction difficulties and the higher void contents of the slag mixtures, which reduced their resistance to raveling. Other features linked to permeability and skid resistance were largely improved, suggesting that these mixtures are especially suitable for permeable pavements in rainy regions. In conclusion, a porous asphalt mixture was produced with 100% slag aggregates that met current standards for long-lasting and environmentally friendly mixtures.

Experimental Study on Mechanical Properties of Recycled Asphalt Mixture with Different Proportion of Rubber Powder

2013 ◽  
Vol 368-370 ◽  
pp. 933-938 ◽  
Author(s):  
Qi Ying Niu ◽  
Jun Yong Zhao ◽  
Ru Kai Li
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Strength ◽  
Bending Strength ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Rubber Content ◽  
Recycled Asphalt ◽  
Rubber Powder ◽  
Different Content

Through a series of mechanical properties experiment of recycled asphalt mixture composed of waste asphalt mixture 20% and different content of rubber powder, the paper analyzes and compares the elasticity, tensile strength and bending strength of asphalt mixture and recycled asphalt mixture, concluding that recycled asphalt mixture that mixed with crumb rubber content of 20% can completely replace the new asphalt mixture in the application. It has great significance for the future to recycling waste asphalt mixture in the highway.

Experimental Study on the Splitting Tensile Strength of Recycled Concrete Made of Brick and Tile

2012 ◽  
Vol 166-169 ◽  
pp. 1521-1525
Author(s):  
Hui Wang ◽  
Ai Liang Zhai
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Regression Analysis ◽  
Elastic Modulus ◽  
Splitting Tensile Strength ◽  
Recycled Concrete ◽  
Water Quantity ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Brick And Tile

By experimental, study on the elastic modulus and the splitting tensile strength together with the influence of the splitting tensile strength with different water-cement ratio, sand rate and water quantity , and the relational formula between the splitting tensile strength and the elastic modulus was summarized by regression analysis.

Experimental Study on Water Stability of Asphalt Mixture

2011 ◽  
Vol 266 ◽  
pp. 135-138 ◽  
Author(s):  
Yu Qing Yuan ◽  
Dan Ying Gao ◽  
Jun Zhao ◽  
Ji Yu Tang ◽  
Shao Hua Zhai
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Asphalt Mixture ◽  
Splitting Tensile Strength ◽  
Water Stability ◽  
Freeze Thaw ◽  
Residual Stability ◽  
Marshall Stability

To improve water stability, we mixed asphalt mixture with cement, slag micro powders and lignin fibers, respectively. The Marshall immersion and freeze-thaw splitting tests were carried out. It is shown that cement replacing mineral powders can improve the water stability of asphalt mixture, especially at the content of 1/3 mineral powders, with a Marshall stability of 11.50 kN and a soaking residual stability of 92.46%, increasing by 10.79% and 6.58%, respectively, than those without any cement. According to the results of cement replaced by slag micro powders, its stability increases by 1.38kN, and the soaking residual stability is 90.64%, but the freeze-thaw splitting tensile strength slightly decreases. It is indicated that the water stability of the asphalt mixture can be improved by adding 0.3% lignin fibers, the soaking residual stability increasing from 86.75% to 97.41% and the ratio of freeze-thaw splitting tensile strength rising from 60.94% to 80.29%. It is concluded that the best effect can be reached by adding 0.3% lignin fibers.

Test on Corrosion Resistance of GFRP Anchor Bolt

2012 ◽  
Vol 535-537 ◽  
pp. 1927-1935 ◽  
Author(s):  
Xiao Yong Luo ◽  
Xie Xing Tang ◽  
Kai Lei Li ◽  
Ya Chuan Kuang
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
Loss Rate ◽  
Mechanical Performance ◽  
Effective Means ◽  
Anchor Bolt ◽  
Geological Conditions ◽  
Anchoring System ◽  
Anchor Bolts ◽  
Corrosion Time

Steel is commonly used as the materials of anchor bolts in permanent anchoring works. The nature the steel anchor bolt easy to be corroded, however, poses a serious potential safety hazard to the anchoring system mainly including steel anchor bolts. To use GFRP(glass fiber reinforced polymer) anchor bolts instead of reinforcing bars is an effective means to deal with corrosion. Based on the test of accelerating aging in high solubility, the physical and mechanical performance tests are conducted on GFRP bolts in normal, acid, alkalis and salt conditions, from which the change law of physical and mechanical property can be studied for bolts in different corrosion conditions. As shown from the test results, the weight of GFRP bolt is reduced after it is corroded and the rate of weight loss increases as the corrosion time extends. Thick swelling can be seen on bolts in alkalis conditions. Loss rate of tensile strength and increase rate of elastic modulus are greater in alkalis conditions than in acid conditions, the former reaching 13.76% and the latter 9.83%. As for bolts in acid conditions, tensile strength decreases as the corrosion time extends while the rate and amount of loss is less than that of bolts in acid and alkalis conditions. The tensile strength decreases as the solubility of corrosion solution increases. The loss rate of tensile strength is the most for bolts in alkalis conditions; it comes second in acid conditions and the least in salt conditions. The elastic modulus of bolts in acid conditions and alkalis conditions increases while the rate is comparatively low as the solubility gets higher. Elastic modulus of bolts in salt conditions decreases as the solubility rises with lower rate and smaller amount of loss. These results supply test foundation for application of GFRP bolts in complicated geological conditions.

Durable and Highly Dissipative Fibrous Composites for Strengthening Coastal Military Constructions

2021 ◽  
Vol 893 ◽  
pp. 75-83
Author(s):  
Cesare Signorini
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
High Resistance ◽  
Mechanical Performance ◽  
Fibrous Composite ◽  
Degradation Process ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Viable Solution ◽  
Organic Fibre

Reinforced concrete strategic structures for military purposes are often established in coastalor offshore areas, widely subjected to chemical attacks, mainly due to an aggressive saline and acidenvironments. Porosity of cementitious conglomerates favour penetration of chlorides, which tend tocorrode the internal metallic rebar. The reinforcement of structures with fibrous composite materialsis a viable solution to restore the initial requirements of the building, especially when it exerts defence purposes. Among synthetic fibres, polyphenylenebenzobisoxazole (PBO) is an organic fibre based on linked aromatic structures with high elastic modulus and tensile strength and highly dissipative attitudes. In this work, the assessment of durability of continuous fibrereinforced cementitious mortar (FRCM) composites is carried out comparing the mechanical performance of laminates subjected to uniaxial tensile tests. It is found that PBOFRCM presents high resistance against aggressive environments and specifically preserve its mechanical strength in the presence of saltwater, where other reinforcing materials undergo to a dramatic degradation process.

scholarly journals Recyclability Potential of Induction-Healable Porous Asphalt Mixtures

2020 ◽  
Vol 12 (23) ◽  
pp. 9962
Author(s):  
Pedro Lastra-González ◽  
Irune Indacoechea-Vega ◽  
Miguel A. Calzada-Pérez ◽  
Daniel Castro-Fresno
Keyword(s):  
Fatigue Resistance ◽  
Mechanical Performance ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Resistance Test ◽  
Reclaimed Asphalt ◽  
Porous Asphalt ◽  
Bituminous Mixtures ◽  
Water Sensitivity ◽  
Wool Fibers

The potential recyclability of healable asphalt mixtures has been analyzed in this paper. A healable porous asphalt mixture with steel wool fibers was artificially aged in order to assess its recyclability. This mixture was used as reclaimed asphalt in a new porous asphalt mixture, whose mechanical and healing capacities were studied and compared with the behavior of the original porous asphalt mixture. The quantity of reclaimed asphalt mixture added was 40%; besides, in order to recover the properties of the aged binder, and incorporate the last advances in the recyclability of bituminous mixtures, a rejuvenator was also added (SYLVAROAD™ RP1000). The voids test, Cantabro particle loss test, water sensitivity test, stiffness test, and fatigue resistance test were performed to mechanically study the experimental mixture, while the last one (fatigue resistance test) was also used to assess its healing capacity. The results have shown that the healing capacity of the original healable porous asphalt mixture is maintained with similar mechanical performance.

Experiment Study of BFRP Bars’ Mechanical Properties

2012 ◽  
Vol 174-177 ◽  
pp. 830-833 ◽  
Author(s):  
Bao Rong Huo ◽  
Xiang Dong Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Mechanical Performance ◽  
Steel Wire ◽  
Tensile Tests ◽  
Test Methods ◽  
National Standards ◽  
Steel Cable ◽  
Tensile Elastic Modulus

The testing rule of mechanical properties of material can be established and the mechanical performance can be found by studying the basic mechanical properties of BFRP bars. Using the opressive sleeve anchor developed by the researchers,tensile tests of BFRP bars are carried out according to the national standards of “GFRP bar tensile test methods”.The BFRP bar’s force-deformation curve is linear before the force-deformation relationship is destroyed,therefore,referring to steel wire or steel cable,the BFRP bar’s reliable strength is suggested to be approximately 80% of its ultimate tensile strength. The BFRP bar’s tensile elastic modulus is related to the content of basalt fiber.The tensile elastic modulus increases with the increase of the basalt fiber’s content and the content increases when the BFRP bar’s diameter becomes longer, so the tensile elastic modulus increases with the increase of its diameter. Compared with steel, the BFRP bar is obviously superior in the aspects of tensile strength, corrosion resistance ,etc,therefore to use the BFRP bar in reinforced concrete structures insead of steel is feasible.

Experimental Study on Basic Mechanical Properties of Recycled Concrete Made of Brick and Tile

2012 ◽  
Vol 166-169 ◽  
pp. 3323-3328
Author(s):  
Ling Jun Xie ◽  
Ai Liang Zhai ◽  
Chun He Wang ◽  
Chang Liang Ji ◽  
Shu Jian Chen
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Failure Modes ◽  
Splitting Tensile Strength ◽  
Recycled Concrete ◽  
Brick And Tile

By experimental, study on the elastic modulus including the failure modes of Recycled Concrete made of Brick and Tile with the splitting tensile strength and the compressive strength, And the relational formula between the splitting tensile strength and the compressive strength was summarized from the results.

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