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The cohesion and friction angle of rock-soil aggregate are influenced by the particle size distribution characteristics and other conditions, especially the water content. ... Table 2 shows an example of shear strength test results for plate basalt and joint surface (triaxial compression experiments are carried out for basalt, and direct shear ...
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Recycled aggregate (RA) was surface treated by sulphoaluminate cement (SAC). • Quality of RA and performance of recycled aggregate concrete (RAC) were improved. • Addition of basalt powder (BP) to the SAC slurry improved the modifying efficiency. • The ITZ 1 and ITZ 3 in the modified RAC presented a sandwich-like structure. •
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In order to determine the correlation between coarse aggregate morphology and the behavior of asphalt mixtures, dense-graded asphalt concrete (AC-13) was prepared, whose gradation was shown in Fig. 1.The asphalt-aggregate ratio was optimum ratio for each kind of mixture in this study and there are 11 types of asphalt mixtures …
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Basalt fibers (BF) are produced from the basalt rocks which are formed because of volcanic lava solidification. BF are abundantly found on earth due to their volcanic origin 1,2.BF have higher ...
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In this study, standard crushed stone was used as coarse aggregates. Aggregates were tested for their loose and compact specific weights and compactness in compliance with TS EN 3529 [14].The results of those tests and limit values specified in the standards are given in Table 1.In the Los Angeles abrasion test which was conducted in …
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3rd International Surface Friction Conference, Safer Road Surfaces – Saving Lives, Gold Coast, Australia, 2011 4 Experimental Program To determine the effect of aggregate arrangement on friction resistance, six different arrangements with a blending of 50 percent limestone – 50 percent basalt were prepared.
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Laboratory results were compared with conventional Basalt aggregates. Results reveals that lime stone aggregates fulfill the requirements of MoRT&H-2001 and can completely replace the conventional aggregate like Basalt in GSB and WMM layers. ... The grain-to-grain action relies on the macro friction of the aggregate. In this case, the internal ...
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In order to investigate the bond stress-slip constitutive relation between BFRP bar and basalt fiber recycled-aggregate concrete, 81 central pullout specimens were tested. Basalt fiber volume percent, fiber length and concrete strength grade were considered to be experimental variables to obtain the bond stress-slip curves. The …
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At the same time, the angle of internal friction φ is mainly the force between many coarse aggregate particles in the asphalt mixture. ... As shown in Fig. 4 (a), the shape of the basalt aggregate is the most irregular. Among the 20 basaltic rocks, only 7 rocks are similar to spherical particles, and 9 rocks have sharp angle particles. Among ...
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This research investigates the effect of basalt fiber (BF) on the fracture properties of recycled aggregate concrete (RAC). Three-point bending tests were performed on notched beams of BF -reinforced recycled aggregate concrete (BFRAC) at varying recycled coarse aggregate (RCA) substitution rates. The study aimed to analyze …
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Basalt aggregate surface has sharp peaks and depressions. Compared with basalt, steel slag aggregate has large sphericity, poor angularity and large surface roughness. ... The parameters to be calibrated for the linear contact model are normal stiffness K n, tangential stiffness K S, and friction coefficient μ. Download : Download …
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In this study, SMA with normal maximum aggregate size 13 mm shortened as SMA-13 was selected as the asphalt mixture and aggregate gradation hereafter. Due to the strong absorption of fine steel slag particles towards bitumen at liquid, it was not chosen to substitute for fine basalt aggregate smaller than 2.36 mm. The percentages of each ...
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The safe application of geological carbon storage depends also on the seismic hazard associated with fluid injection. In this regard, we performed friction experiments using a rotary shear apparatus on precut basalts with variable degree of hydrothermal alteration by injecting distilled H 2 O, pure CO 2, and H 2 O + CO 2 fluid …
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In addition, the aggregate gradation of each mixture was described by the two-parameter cumulative Weibull distribution function. Statistical analysis of test results led to the development of a function for predicting the International Friction Index, which is a measure of skid resistance of asphalt mixtures, after different intervals of ...
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This study determined the effect of coarse aggregate types and nominal maximum aggregate size (NMAS) on the skid resistance deterioration of an UTWC. Different types of stone mastic asphalt (SMA), which are used in three kinds of coarse aggregates (diabase, limestone, and basalt) and three kinds of NMAS coarse …
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To deal with the poor mechanical and durability of Recycled aggregate concrete (RAC), the effects of the addition of Nano-SiO 2 (NS), Basalt fiber (BF), and composite addition of NS and BF are put forward. The addition of BF reduces the generation and development of early primary microcracks in RAC and prevents the …
Details@article{Luo2024ImprovingSD, title={Improving skid-resistance durability of ultra-thin friction course in asphalt pavements through recycled steel slags as basalt replacements}, author={Haoyuan Luo and Siyu Chen and Yan-Huang Zheng and Xiangyan Wu and Can Chen and Xiaoming Huang}, journal={Construction and Building Materials}, …
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This research aims to improve the durability of skid resistance of asphalt pavement from the perspective of coarse aggregates based on on-site investigation. Firstly, the skid resistance of six representative actual roads was tested during two years by employing the Dynamic Friction Tester and the attenuation characteristics of skid …
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Coarse aggregate is continuously graded crushed stone with a particle size of 5–20 mm, and the mud content is less than 0.2%. The fine aggregate is natural river sand with a fineness modulus of 2.52, a bulk density of 1450 kg/m 3, an apparent density of 2570 kg/m 3, and a mud content of <1.0%.
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The PSV of aggregate in the ultra-thin friction course should be greater than 42BPN according to the Chinese standards [18,19]. The PSV values of 90# calcined bauxite, 85# calcined bauxite, 80# calcined bauxite, 75# calcined bauxite, and basalt meet this requirement.
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This study aims to evaluate the macro-micro-meso-mechanical properties of basalt fiber (BF)-reinforced recycled aggregate concrete (BFRAC). Firstly, the effects of BF with different contents and lengths on the mechanical properties of recycled aggregate concrete (RAC) at different ages were analyzed.
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The proportions of each basalt aggregate in the designed mixture are adjusted until an optimum fit between P mix (D) and P tar (D), using an optimization algorithm based on the Least Squares Method, as presented in Eq. (2). ... which increase the inter-particles friction [26]. The increasing addition of limestone powder improves the …
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Eight circular 225 mm diameter samples were used in the study, being either mosaics or asphalt mixes as defined in Table 1 by respectively the 'A' or 'M' notation. The mosaics are made by manually placing the 7.2–10 mm fraction sized aggregates in a mold packed as close as possible to each other to form a single layer, and then bonding the …
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One basalt fine aggregate (0–3 mm) and three basalt coarse aggregates with different particle sizes (3–5, 5–10 and 10–15 mm) were selected. Table 1 shows the properties of basalt coarse aggregates according to the Chinese specifications [ 24 ], while Table 2 shows the properties of lime coarse aggregates with different particle sizes (3 ...
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The texture and friction properties of asphalt slabs have been evaluated by means of sand patch test, 3D laser scanner and dynamic friction tester respectively. The results indicated that a relationship exists ... mix aggregate (basalt aggregate as coarse fraction and limestone aggregate as fine fraction) constitute the third group. It should be
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Mix Proportioning. Three normal strength concrete mixes containing quartzite, granite and basalt aggregate were prepared based on the trial method keeping in view the guidelines of IS: 10262 [] at an ambient temperature of 27 ± 2 °C and relative humidity of 60%.These concrete mixes were designated as NSC1 (quartzite aggregate …
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Basalt fibers (BFs) are formed by drawing molten basalt (one of the most widely distributed volcanic rocks on the earth, for which the primitive magma originates from the upper mantle 1) at high …
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The mean values obtained from the basalt aggregate series (B0, B25, B50, B75, and B100) were determined as 50.74 and 51.28 kΩ.cm, respectively. When the waste marble and basalt aggregate HSSCC series were compared, higher electrical resistivity values were obtained in the waste marble aggregate series, albeit at very low rates.
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FDOT: High Friction Surface Treatment Guidelines. HighFriction Aggregate The most common aggregate used for HFST is calcined bauxite This aggregate is first in class in terms of skid resistance Other aggregates like flint, basalt, and granite may only be used for preventative maintenance applications that are not safety critical The aggregate …
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ANALYSIS OF USE OF BASALT AGGREGATE IN CONCRETE MIXES WITH GRANITE STONE UNDER M-20 & M-25 GRADES . Guided by: Dr. Ashad Ullah Qureshi . Contact: 6260651575, …
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Basalt rocks are a common geological formation that plays a crucial role in various engineering applications, such as construction, infrastructure development, and geotechnical engineering.
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