effects of rock types and crushing mechanisms on the morphology of manufactured sands were investigated. Three rock types, i.e., granite, conglomerate rock, and limestone, and two crushing mechanisms, i.e., Vertical Shaft Impact (VSI) crusher and Horizontal Shaft Impact (HSI) crusher were used. By

Effect of Crushing Process Parameters on Quality of Fly Ash Aggregates Produced After Crushing High Strength Fly ash Blocks: A Laboratory Investigation Graphical Abstract March 2024 DOI: 10.5829 ...

The test results showed that (1) the failure mode between basalt fiber-reinforced polymer bars and concrete was equally contributed from crushing of concrete and failure of basalt fiber-reinforced ...

In this research work, the mechanical strength of crushed stone aggregate fractions for road pavement construction in Western Nigeria was assessed. Samples of crushed stone aggregates were collected from nine (9) representative quarries spread across

Highlights Manufactured sand characteristics have a great influence on pavement performances of concrete. Increasing rock microfines amount to 20% will increase strength and improve abrasion resistance of concrete. Sand with both large roughness and low crushing value is beneficial to enhance flexural strength and …

The characteristics of aggregate can be categorized into physical characteristics such as shape, texture, grading, absorption, strength, maximum size, specific gravity, soundness and toughness as well as geological characteristics such as mineralogy and surface coating [].Some of these properties (e.g. surface coating) are …

Performance period or life span of a flexible pavement is dependent upon the load carrying capacity of its base and subbase layers.Pavement strength …

Concrete should be free from soft, too porous, chemically active or extremely flaky material because the aforementioned features and the quality of aggregates generally impact the long-term ...

The effect of crumb rubber on the mechanical properties (such as California bearing ratio, unconfined compressive strength, aggregate crushing value, dynamic lightweight cone penetrometer, Clegg impact value, Los Angeles abrasion values, and resilient modulus) of the C&D aggregates was then examined. Based on the …

The following has been shown in the available literature : the changing law of the shear strength of coarse aggregate soil with the content of coarse aggregates (d ≥ 4.75 mm) is when the content of coarse aggregates is less than 30%, the strength increase is not obvious, and the fine aggregates control the shear strength of the granular ...

While rock samples fail under static loading in strength tests, there are dynamic loads in the crushing process. Therefore, the effects of water saturation on the crushability of rocks cannot be ...

To explore the effects of rock crushing strength on the mechanical response of a rock-filled gabion cushioning layer subjected to dynamic boulder impact a parametric study was carried out. The tensile strengths of the parallel bond between particles was adjusted to match the peak compression load (rock crushing strength) …

Weak interlayer zones (WIZs) are widespread in rock masses. Due to their relatively poor mechanical properties, they poses a potential threat to the stability of rock masses. Brazilian tests and numerical simulations were conducted to study the effects of WIZ strength (WIZS), WIZ thickness (WIZT), and loading direction of rock samples. …

Pebble B, with a crushing value of up to 10.5%, exhibits both high surface smoothness and a relatively loose internal structure. As illustrated in Figure 6c, the embedding effect of …

The approach bridge is a cement concrete structure with a pavement consisting of a 6 cm lower layer of AC-20 and a 4 cm upper layer of SMA-13. In an experimental pavement section, REAP was incorporated into the AC-20 mixture. Based on the findings of this …

The effect of crumb rubber on the mechanical properties (such as California bearing ratio, unconfined compressive strength, aggregate crushing value, dynamic lightweight cone penetrometer, Clegg impact value, Los Angeles abrasion values, and resilient modulus) of the C&D aggregates was then examined.

The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete. ... The compressive aggregate strength is an important factor in the selection of ...

Download scientific diagram | Classification of aggregate strength quality for road pavement from publication: Assessment of Rock Aggregate for Construction Using Comminution Theory | In this ...

reported that a higher w/c ratio results in weaker ITZ interface between the cement paste and rock aggregates. As shown in Fig. 5b, this phenomenon explains the comparable strength between grout and CTRR at w/c = 1.0, thereby suggesting that bond strength at ITZ is relatively as weak as the strength of grout at higher w/c ratios.

The suitability of the 4-parameter Weibull equation to describe size effects on the crushing strength reported in the literature is discussed. Furthermore, a Weibull statistical analysis was carried out for a wide number of experimental results on rock aggregates, where it has been observed that strength decreases with particle size.

Waste crushed rock (WCR) is composed of graded fine and coarse aggregates produced during the crushing, scalping, and screening of a raw rock feed source, newer basalt surface spalls (NBSS) and/or crushed concrete [37], [48]. Although the C&D aggregates have recently been used in different civil engineering applications, their …

In general, compared to intact rock, a rock mass has reduced tensile strength (almost zero), and reduced shear strength especi ally along discontinuity planes. Furthermore, …

Effects of the freeze-thaw process on the rubberized RCA were studied.. M r of rubberized RCA subjected to freeze and thaw was higher than the RCA only.. UCS of F-T samples was slightly lower than that of the control samples.. UCS of T-F samples was remarkably higher than that of the control samples.. Rubberized RCA can be used for …

The most generally used measurement of rock strength is the simple compressive strength—the uniaxial compressive strength. ... Table 1 details the effects of some end cap materials. For weak to strong rocks it can be seen from Table 1 that the use of either soft or hardboard inserts, or even thick cardboard, results in the highest failure ...

Rock mass composed of Broken Soft Rocks (BSR) under confined compression is widely distributed in geotechnical and underground engineering. To …

The outcomes of this study can provide practical guidance on the application of rubberized waste crushed rock as pavement base/subbase materials. ... is composed of graded fine and coarse aggregates produced during the crushing, scalping, and screening of a raw rock feed source, newer basalt surface spalls (NBSS) and/or crushed concrete …

Rock mass composed of Broken Soft Rocks (BSR) under confined compression is widely distributed in geotechnical and underground engineering. To reveal the influence law of rock grain gradation and compression ratio on the shear strength properties of Regenerated Rock Mass Structure (RRMS) formed by confined …

1. Introduction. Semiflexible composite pavement is formed by infusing cement slurry into the large void asphalt mixture. Cement grouting asphalt macadam materials, also known as semiflexible pavement (SFP) materials, outperform conventional asphalt concrete materials, and these advantages are attributed to the existence of …

Effects of rock crushing strength. The crushing strength of the rocks used in the gabions in the field may vary depending on their mineralogy (Taylor and Spears, 1981; Lee and Coop, 1995; Laubscher and Jakubec, 2001; Afshar et al., 2017). To explore the effects of rock crushing strength on the mechanical response of a rock-filled …

C&D waste comprises a wide variety of waste materials, including RCA, reclaimed asphalt pavement, crushed brick, crushed glass, and crushed rock. Recycled concrete aggregate (RCA), produced during C&D activities, is obtained from crushing the concrete chunks into aggregates [41], [53].