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At 5% and 12% fines contents, the strength values of crushed limestone samples in CA 6 and CA 2 gradations typically increase within the same PI level when dust ratio increases from 0.4 to 0.6 and decreases thereafter. However, at 8% fines content, the effect of DR is opposite compared to results obtained at 5% and 12% fines contents for …
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KEYWORDS: Limestone, Compressive strength, Modulus of elasticity, Shape effect, Size effect. INTRODUCTION . The unconfined compressive strengthis the most direct mean s of determining rock ...
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The porosity-to-cement index (η/Civ) has been extensively applied to study the evolution of different types of soil stabilization. However, this index has still not been used to characterize soils cemented with crushed limestone waste (CLW). In this sense, this paper sought to analyze the applicability of the porosity-to-cement index over the …
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The strength of uniaxial compression decreases with the increase of height: diameter (L/D) ratio till it tends to a stable value, which implies that the lower bound of L/D should be …
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Mundra and Aggarwal [15] reported an increment of compressive strength with the use of waste limestone dust in concrete up to 30%. As per a study, Bederina et. al. [8] compression strength increases up to 5% incorporation of fine limestone dust particles in the mix of concrete. ... we used crushed limestone dust as a fine aggregate and ...
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A little difference (3% - 7%) is observed at three and 28 days, with the highest values for the EM. As for Grade C30, the lowest value is obtained for MM at three and 28 days. The well-graded crushed sand does not improve the compressive strength. Figure 2. Compressive strength results for CM, EM, and MM concretes for Grade C30 and …
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In this study, 31 empirical equations are summarized that relate unconfined compressive strength and internal friction angle of ... shale, and limestone and dolomite) to physical properties (such as velocity, modulus, and porosity). These equations can be used to estimate rock strength from parameters measurable with geophysical well logs. The ...
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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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Fossiliferous limestone is a type of sedimentary rock that contains abundant fossils. It is formed through the accumulation and compression of organic remains, such as shells, coral, and other marine organisms, along with sediments. The fossils preserved in fossiliferous limestone provide valuable insights into past life forms …
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The 28-day concrete cubes cast with these aggregates shows that, at the low strength of 20N/mm2, Igneous rock crushed granite stone c concrete had the highest strength of 26.45N/mm2 followed by Sedimentary-limestone with 26.11 N/mm2 and Metamorphic rock – marble stone 26.03 N/mm2 in that order, and also at the high …
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Concrete Made with Rounded Gravel and Concrete Made with Crushed Limestone Page 6 CONCLUSIONS A rounded gravel and a crushed limestone were used as coarse aggregates in similar concrete mixes. Both concretes were evaluated for length change, flexural strength, and compressive strength. The
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From the experimental results, the 7-day unconfined compressive strength of ordinary Portland cement-stabilized crushed stone accounts for 69.1% of its 90-day final strength, while the strength ...
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Effect of Type of Sand on the Flowability and Compressive Strength of Slag-Fly Ash Blended Geopolymer Mortar ... Twelve mixes were prepared with two types of sand: desert dune sand (DS) and crushed dolomitic limestone sand (CS). Different alkaline activator solution-to-binder (0.50, 0.60, and 0.65) and binder-to-sand ratios (1:2, 1:3, and 1:4 ...
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Anahtar Kelimeler: Yapay Sinir Ağları, Regresyon Tekniği, Beton, Basınç Dayanımı DETERMINING THE COMPRESSIVE STRENGTH OF CRUSHED LIMESTONE AGGREGATE CONCRETE USING DIFFERENT PREDICTION METHODS ABSTRACT In this work two different prediction models have been developed to determine crushed …
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The compressive strength ranges between 149.71 N/M'and130.51 N/M'. The high values of water absorption (1 .27o/o and porosity (0.88%) for L3 reduces its quality and suitability for use as ...
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limestone containing self compacting concretes is the consequence of the microstructure of cement matrix [4]. The use of limestone powder in cement and concrete provides economic and environmental advantages by reducing Portland cement production and CO2 emission, as well as improving the early and the later age compressive strength [5].
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The compressive strength of concrete sample in different water–cement ratio (MPa) Aggregate Optimum w–c=0.33–0.36 Water–cement=0.3 Water–cement=0.4 Water–cement=0.5 dimension (mm)
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Recently, it has been difficult to get natural sand for concrete due to an insufficient supply in Korea. Crushed sand was thought as a substitute and previous research has been focused on low fluidity and normal compressive strength (24–30 MPa). Study on high performance concrete using crushed sand is hardly found in Korea. In …
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The samples examined showed good compressive and tensile strength properties suitable for block production in accordance …
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Usage of industrial by-products such as ground granulated blast furnace slag (GGBFS), gypsum, and limestone powder have gained prominence in concrete production. It is, therefore, very important to conduct research into the various materials and their attendant influence on properties of concrete at different ambient temperatures. This …
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PDF | On Jan 1, 2010, M.S MEDDAH and others published Effect of Size and Content of Coarse Aggregate on the Compressive Strength of Concrete | Find, read and cite all the research you need on ...
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This paper investigates the interactions of aggregate strength characteristics with those of aggregate gradation, material type, fines content, dust ratio and plasticity …
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Below the Simsima Limestone and the Midra Shale, the uniaxial compressive strength of the various strata is low to very low, even at depths in excess of 100 m.
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Taking the population – that includes 100 concrete mixtures – a regression analysis between pulse velocity (V) and compressive strength (R) was performed, obtaining a correlation coefficient equal to 0.78 by using an exponential model which is the best fitted for the relationship under study.Eq. (1) shows the obtained model. (1) R = …
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Crushed limestone sand (CLS) is a by-product that is generated during limestone excavation. From an environmental perspective, it is beneficial to use CLS as a substitute for natural sand. ... Density Compressive …
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The feasibility of using crushed limestone instead of sand in cement grout is examined in this work. This study entails performing several tests, including the Brazilian test, the compressive strength test, and the stress-strain correlation test. The curing times used were 7, 14, and 28 days for mix …
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Strength values, used with rock mass data such as discontinuity information, are used to identify the most appropriate methods to extract building stone. Of the sites assessed, the exotic limestone rocks were classified as having the highest potential for producing …
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