· Today, due to environmental issues and consequently preserve of natural sources, the need to introduce sustainable and eco-friendly alternatives to construction materials has been imperative. In construction materials, none is more widely used than concrete. In line with this aim, researchers have suggested the use of pozzolans and
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· Fundamental research on single-particle breaking and the uniaxial compressive strength (UCS) of carbonaceous mudstone aggregates at different water contents was carried out to investigate the relationship between the single-particle crushing strength and UCS. Based on elasticity theory and the superposition principle, a shape
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The difference in the unconfined compressive strength between. the slow and the rapid rates of loading for the rocks tested varied. considerably. The dynamic compressive strength factor f^ for the. granite was less than 1; for the basalt, 1.35; for the limestone, 1.52; and for the tuff, 1.74.
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The ultimate compressive strength of limestone in the dry state ranges from 10 MPa (for porous) to 50 MPa (for marble limestone) according to GOST 9479-98 “Blocks of rocks
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· Uniaxial compression strength (UCS) is a fundamental parameter to carry out geotechnical engineering design and construction. It is simple and efficient to predict UCS using point load strength (PLS) at
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· Traditional natural river sand is used as a fine aggregate for concrete, but due to the severe environmental situation in recent years, many places have asked for a ban or restriction on the extraction of river
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· The corresponding optimum compressive strength is 29.88 MPa against 19.76 MPa for the composition without limestone fines (fl = 0%), which represents an increase in compressive strength of about 34%. However, the grading analysis of the limestone sand shows that the rate of fines in the sand is between 9 and 10% .
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· The limestone fil ler used is a finely divided lime, obtained by crushing of limestone. Limestone filler is a white dry tender into semi-tender primarily com posed of 83.64%carbonate.
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· In this study, self-compacting lightweight concrete (SCLC) was prepared using crushed limestone dust, and the effects of different types of polypropylene fibers and chemical admixtures on the rheological properties of SCLC were investigated. The workability of SCLC was assessed by conducting slump flow, J-Ring, and V-funnel tests,
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· Rock texture is a term representing the mineral grains, grain sizes, and matrices of rocks. Crushability properties of rocks are very important parameters on an industrial scale and they can be determined by different methods. This study investigated the effects of textural properties of rocks on their crushability. For this purpose, some
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· This paper examines the influence of limestone fines in crushed sand on concrete properties. Properties include strength, water, gas and chloride-ion permeability and capillary water absorption. Four different cement types were used while maintaining a constant water/cement ratio. The results show that concrete containing 15% of
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The mechanical properties, including cubic and axial compressive strengths, modulus of elasticity, splitting tensile strength, and flexural strength and toughness of the SFRMC, were
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· Limestone is a type of common industrial natural stone. It has the highest tensile strength and the lowest thermal conductivity among natural stone materials. The graph bars on the material properties cards below compare limestone to other natural stone materials (top) and the entire database (bottom). A full bar means this is the highest value
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limestone fines in concrete. The maximum decrease in the value. was at the 15% quantity of limestone dust. Beixing et. al. [4] reported a downfall in chloride ion permeabil-. ity value with the
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· Dependence of dynamic compressive strength on loading rates: (a) dynamic compressive strength as a function of strain rate, (b) dynamic compressive strength as a function of stress rate. The Stefan effect, Newton internal friction effect and Meniscus effect of water in the primary defects of reef limestone specimens are
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· Changes of compressive strength of MSC with curing ages t are shown in Fig. 2, which are similar to authors’ previous test results as shown in Fig. 3.Where f cu,t is compressive strengths at t days. It can be seen that the strength grew rapidly within 3–28 days and slowed down after 28 days.days.
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Author's personal copy of Japanese limestone is between 2.60 g/cm 3and 2.70 g/cm in general and its water absorption is low (0.2 0.8%) compared with crushed stones and other gravels. In addition, the variation of prop-erties is relatively small compared with other
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· As it is seen from this figure, the highest compressive strength was measured for granite and the lowest compressive strength was that of tuff, among the studied parent rocks. The ratio of the compressive strength calculated for
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· Concrete is the most widely used material in construction. It has the characteristics of strong plasticity, good economy, high safety, and good durability. As a kind of structural material, concrete must have sufficient strength to resist various loads. At the same time, due to the brittleness of concrete, compressive strength is the most
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· The accurate determination of uniaxial compressive strength (UCS) plays a vital role in the initial design phase of rock engineering and rock geotechnics. Traditionally, this assessment entails costly, time-intensive and labor-demanding experimental tests. Consequently, there is significant promise in exploring machine
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· Using coarse aggregate of 20–25 mm as DFCA, the limestone powder as aggregate microfine could further improve the compressive strength of DFCA concrete with a distributing-filling ratio of 20%
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The mix design was based on a previous study of mixed-sand concrete with a target cubic compressive strength of 48.2 MPa at a strength grade of C40 [20], a fly ash content (β fa ) of 30%, a sand
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Media. The Unconfined Compression Test is a laboratory test used to derive the Unconfirmed Compressive Strength (UCS) of a rock specimen. Unconfirmed Compressive Strength (UCS) stands for the maximum axial compressive stress that a specimen can bear under zero confining stress. Due to the fact that stress is applied
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· The results proved that up. to 15% of fines content in crushed sand could be used without adversely affecting concrete strength. However, little work has been done. so far on the effect of
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· The uniaxial compression strength and elastic modulus of limestone decrease with increasing degree of saturation (Griggs 1936; Chen and Zhou 1991; Xu et al. 2008). Huang et al. ( 2006 ) pointed out the mechanical effect of water interacting with rock has a clear time dependence, and chemical corrosion significantly decreases
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· Also, the water film thickness was found to be reduced across w/b 0.35-0.60 with increasing limestone dosage (0, 4, 8, 12 % limestone) and correspondingly, strength and RCPT results also improved .
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:Concrete and CementCrushed Limestone Powder · This study evaluates the effect of increasing lime contents in the compressive strength and stiffness of rammed earth, and analyzes the strength
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· For each type of coarse aggregate. 75 cubes (150x150mm) were cast to allow the co mpressive strength to be monitored at 3, 7, 14, 21, and 28 days. Test result show that concrete made from
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· Ratio of compressive strength to flexible strength of cement-based material without any of limestone powder at 28 d is 5.2 more then those adding 5%, 15%, 35% limestone powder to cement-based
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Ilangovana at 2008 [8] reported strength of quarry rock dust Crushed limestone is a waste material generated from Abstract—cutting large stones in (Hillan factories) in Mosul and otherof conventional concrete. Hameed and Sekar 2009 [5] studied towns north of Iraq.
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