Similarly, the proportion of RCA was kept the same as natural aggregate. Therefore, the gradation of coarse aggregate was not studied. The particle size of sand was kept below 4.75 mm, however, the gradation of fine aggregate was studied and shown in Fig. 2. The fineness modulus of sand was 2.98 and it is used for conducting the …
Absence of coarse aggregate and finer grain size of fine aggregate influences the nature of fine-grained concrete (FGC) from the other types of concrete, and it is desired to evaluate its elastic moduli. ... Development of basalt fiber reinforced fine-grained cementitious composites for textile reinforcements. J Compos Sci 6(12):395. …
Since sustainable and environmentally friendly structural concrete has received special attention, structural light-weight basalt concrete has gained popularity. However, it is rarely used in the construction industry domestically. Basic porous basalt aggregates, are introduced to replace acidic silica aggregates with control of shape, …
The optimum asphalt contents of the asphalt mixture using low-porosity basalt aggregate and high-porosity basalt aggregate were determined to be 5.7% and 5.9% in the surface layer, 5.3% and 5.4% in the intermediate layer, and 4.7% and 5.1% in the base layer, respectively.
The grain size curve of aggregates considered suitable for use in concrete is presented in Fig. 2.As can be seen in Fig. 2, since the grain-size curve of the aggregate used in the present study is between the TS 802 standard curves, it has been determined that the maximum compaction is ensured and it is suitable for use in concrete in this …
The well-graded hematite sand obtained from crushed stones with a fineness modulus of 4.89 is used as the fine aggregate. Both hematite fine and coarse aggregate are obtained from the quarry site "hematite boulders and stone crushed for construction". Cluster basalt fibres (CBF) of size 30s 6 mm length are used as additive in the concrete mix.
The basalt aggregate size effect on mechanical strength is measured and analysed. ... [39] and Yu [40] recommended using q in the range of 0.22–0.25 to design self-compacting concrete and UHPC with fine aggregate. However, an appropriate value of q has not been investigated for the UHPC incorporating coarse aggregate.
Basalt is a fine-grained, extrusive rock comprised of mostly mafic minerals. ... their grain maturity and grain size are different due to the different cooling rates. Extrusive rocks form faster than intrusive rocks giving them a typical porphyritic texture. ... Basalt is most commonly used as an aggregate or filler. Since it is strong, it can ...
reference mix), 25% basalt, 50% basalt, 75% basalt and basalt. The composition of each mix was 60% coarse aggregate of 20 mm size and 40% coarse aggregate of 10mm size. Fine aggregate confines to zone-I. 4.2 Casting and Curing Two different sets of specimens are prepared using design mixes M40 and M50 for each set respectively.
Quick facts and properties. Name: Basalt. Rock type: Igneous. Origin: Extrusive. Texture: Fine-grained or aphanitic with grain sizes less than 1/16 mm but …
1.1. Aggregate Shape. Ueno, A. investigated [] the influence of the particle shape of coarse aggregates on two optimal fine to total aggregate ratio values based on the virtual voids-ratio diagram as well as obtained in an actual concrete compaction experiment.The compaction of the concrete improved as the average coarse aggregate …
Size of Fine Aggregate Is. The size of fine aggregates is defined as 4.75mm or smaller. That is, aggregates which can be passed through a number 4 sieve, with a mesh size of 4.75mm. Fine aggregates include things such as sand, silt and clay. Crushed stone and crushed gravel might also fall under this category. Types of Aggregate
The optimum asphalt contents of the asphalt mixture using low-porosity basalt aggregate and high-porosity basalt aggregate were determined to be 5.7% and …
Various percentage of basalt as a partial replacement weight percentage of ordinary Portland cement by 7.5%, 15%, and 22.5% is carried out. effect of basalt on …
Some studies were done on basalt aggregate concretes in the middle of 20th century, the results of which revealed that basalt rocks were superior compared to other rocks. ... Rao G.A. Long-term drying shrinkage of mortar—Influence of silica fume and size of fine aggregate. Cem. Concr. Res. 2001; 31:171–175. doi: 10.1016/S0008 …
Single size range of basalt aggregate (SSRBA) with the size between 13.2 mm and 16 mm was used in this paper to investigate the fragmentation behavior in DCT. ... C-I and C-II, and had more fine aggregates (aggregate size ≤ 2.36 mm), causing better result in Cantabro abrasion test. It was also worth noting that the gradation of S …
The crushed basalt and granitic CA are used in the preparation of the PQC mix. Also, three different nominal maximum aggregate size (NMAS) 19, 26.5 and 31.5 mm, are selected based on the IRC 44: 2017 guidelines. ... studied the influence of aggregate size on PQC used in pervious concrete and reported that the smaller NMAS results in …
Pervious concrete structure consists of meso-sized pores due to partial or complete elimination of fine aggregates, resulting in decreased mechanical properties in par with conventional concrete.
is quartz. The maximum particle size of fine aggregate does not exceed 4.75 mm, and the density is 2.65 g·cm-3. The natural coarse aggregate is broken basalt with a continuous gradation of 5-20 mm in diameter and a density of 2.96 g·cm-3. The particle size distributions of natural fine aggregate and coarse aggregate are shown in Fig.1.
The effect of these combinations was investigated on the Superpave aggregate consensus properties: Flat and Elongated (F&E) particles, Coarse Aggregate Angularity (CAA), Fine Aggregate Angularity ...
In the present research, Ultra-high Performance Concretes (UHPCs) applying coarse basalt aggregate with a maximum particle size of 16 mm are designed …
Basalt aggregate had a relatively lower passing percentage through a wide sieve size, which indicates a strong resistance to breakage under compression. ... Among the contributions of coarse (2.36–13.2 mm) fraction, small (0.6–2.36 mm)-size fraction and fine (0.075–0.6 mm) fraction, the coarse fraction had the greatest influence on ...
As shown in Table 1, the relative (apparent) density of the 0-mm to 2.36-mm nominal maximum aggregate size (NMAS) basalt aggregate was 2.881 g/cm 3 and the relative (apparent) density of the 2.36-mm to 4.75-mm NMAS basalt aggregate was 2.710 g/cm 3. ... Fracture morphology of fine aggregate asphalt mixtures: (a) basalt, (b) steel …
Full size image. Results and discussion ... coarse aggregate, fly ash, basalt fiber content, fiber length, and diameter had less impact on the compressive strength. ... higher fine aggregate or ...
Basalt aggregate (BA) with a 3% water absorption, raw recycled aggregate and basalt (RRA), and improved recycled aggregate and basalt (PRA) were the main experimental variables.
In this study, a 1:2.46:3.37 mix ratio of cement, fine aggregate, and coarse aggregate was used with a water binder ratio of 0.53. Table 5 shows the concrete mix proportions for various basalt replacements by cement weight.
Black Basalt Aggregate. A distinctive, deep grey-black shade when dry, Black Basalt is a naturally angular aggregate which turns to a solid black colour when wet. A particularly popular material, the Black Basalt aggregate is fantastic for using alongside our matching Black Basalt paving flags and setts.
Aggregate is made by harvesting large rocks and then crushing them using mechanical crushers which can produce various crushed stone grades of different sizes. ... Pebble sizes range from finer to very coarse with gravel particle size diameters as follows: Fine gravel – approx 0.157 – 0.31 inches; Medium gravel – 0.31 – 0.63 inches ...
As seen in table the mixture consists of 50% coarse aggregate and 50% fine aggregate in weight. The selected aggregate gradation was in accordance with the General Directory …
Fourteen mixtures were tested containing two nominal maximum aggregate sizes (9.5 and 19.0 mm), two coarse aggregates (granite and crushed gravel), and four …
Introduction to fine aggregates: The maximum size used is 80 mm and the range of 80 mm to 4.75 mn is known as coarse aggregate and 4.75 to 150 µm is called fine aggregate. Size 4.75 mm is common for both fine and coarse fractions. Qualities of fine aggregates:
RCA of the same size range adheres to the specifications of GB/T 25177 [59]. Natural fine aggregate (NFA) adopted is river sand, ranging from 0.075 mm to 4.75 mm in particle size, in compliance with GB/T 14684 [60]. Aggregate physical parameters are detailed in Table 1.
The fine aggregate was made of continuously graded medium sand with a fineness modulus of 2.81 and a grain size of 0–2.5 mm. ... Download: Download full-size image; Fig. 6. Effect of basalt fibre content on axial tensile strength. As can be seen from Fig. 6, when no BF was added, the axial tensile strengths of concrete with three different ...
Single size range of basalt aggregate (SSRBA) with the size between 13.2 mm and 16 mm. ... formed systems generally owned larger air void structures since they were composed of more coarse aggregate and less fine aggregate. These structures contributed to worse results in abrasion, low temperature cracking, and moisture …
The fine limestone aggregate (materials passing sieve # 4 (size 4.75 mm)) were replaced by basalt in the third mix. In the fourth mix, all the used aggregates were basalt. Marshall Mix design procedure (ASTM D1559), currently followed procedure in Jordan for asphalt concrete mix design, was used to determine the optimum asphalt …