The effects of ordinary limestone powder (OLP) and ultrafine limestone powder (UFLP) on the fluidity, setting time, compressive strength, hydration heat and …
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1. Introduction. The Portland cement (PC) industry is a major contributor to global environmental impact with approximately anthropogenic 8% CO 2 emissions [1].Hence, the replacement of PC material in a form of alkali-activated concrete (AAC), also known as geopolymer, has been a topic of interest for academia and industry in recent …
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PLC is one of four blended cement types described in ASTM C595, Standard Specification for Blended Hydraulic Cements, and its AASHTO counterpart, M 240. For portland-limestone cements (PLC, or Type IL), ground limestone is included as a cement ingredient at quantities from 5% to 15%, which is up to 10% higher limestone content …
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The chemical reaction between CO2 and a blended Portland cement concrete, referred to as carbonation, can lead to reduced performance, particularly …
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In this study, ordinary Portland Cement (with a specific surface area of 3340 cm 2 /g, P.O.42.5) was used as the primary cementitious material. The main chemical components are listed in Table 1.The main component of the finely ground limestone powder had a Blaine specific surface of 8600 cm 2 /g and a CaCO 3 content of 98.50 % …
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In the study, a mix of M30 grade concrete was used and designed as per the guidelines of IS 10,262 2009 [33]. 10, 20, 30, and 40% of fine aggregates were replaced with crushed limestone dust in the concrete mix.Water-cement ratio and content of cement were kept constant (0.462 and 430 kg/m 3 respectively) in the study. Coarse …
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This paper discusses how limestone powder (LS) affects the workability, setting time, shrinkage, mechanical properties and durability of concrete. It also …
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The structure of periclase crystals is the most important factor affecting delayed expansion [16].Reducing the size of periclase particles [17], [18] as well as the largest–to–smallest diameter ratio [18], finely grinding raw meal and cement [19], and uniformly distributing periclase crystals [19] are important methods of curtailing periclase …
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Portland cement (P I 42.5), limestone powder and tap water were used in this study. According to Chinese Standards GB175-2007 [18], the compressive strength of Portland cement at 3 and 28d were 26.6 and 57.3 MPa, respectively.The specific surface area of Portland cement was 336 m 2 /kg. The selected volume weighted average …
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In a study conducted by Al-Nu'man, Bayan S., et al., the impact of incorporating limestone powder (LSP) and styrene butadiene rubber (SBR) latex into …
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1. Introduction. Given the potential supply problem of conventional supplementary cementitious materials (SCMs) such as fly ash or ground granulated blast-furnace slag (GGBFS), the involvement of limestone in Portland cement has been a point of discussion [1, 2].Indeed, from the perspective of its sufficient supply, Portland …
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Due to the dilution effect when partially replacing cement, there is a reduction in the concrete's physical properties. ... This allows for an evaluation of the various cement/limestone powder ...
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The development of new building elements, such as concrete and mortar with sustainable materials, which produce a lower carbon footprint, is an achievable …
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1.Introduction. In recent years, Limestone Calcined Clay Cement (LC 3) [1], which primarily comprises calcined clay, limestone powder, and cement clinker, has …
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With the increasing depletion of high-quality raw materials, siliceous limestone, sandstone and other hard-to-burn raw materials containing crystalline SiO2 are gradually being used to produce clinker. This study investigates the influence of the quartz content and particle size in siliceous limestone on the calcination process and the …
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The use of limestone in the construction industry has been increasing due to benefits as aggregate. Some of these benefits include good strength, low possibility of alkali-silica reaction and the ...
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Finally the effects of cement replacement by limestone, on the price and the CO 2 emission of UHPC were estimated and summarized in Table 5; it should be noted that the limestone used in this investigation was quite expensive as it had a controlled particle size distribution as this is easier to use in laboratory studies. However the unit bulk ...
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To further explore the effects of limestone powder (LP) on the hydration of Portland cement as well as the formation and transformation mechanism of calcium carboaluminate phases, the hydration reaction between LP and tricalcium aluminate (C 3 A) is thoroughly studied in this paper. Due to the crucial influence of gypsum on the …
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The good relationship between permeability and critical pore width was found by many researchers [56], [57], [58], the small critical pore width result in a good resistance of permeability, the dcr of CL5 cement paste is almost equal to CSA cement at later ages, therefore, the cement with 5 wt% limestone powder have a positive effect …
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A study on hydration, compressive strength, and porosity of Portland-limestone cement mixes containing SCMs. Cem. Concr. Compos., 51 (2014), pp. 1-13. View PDF View article View in Scopus Google ... A quantitative study on physical and chemical effects of limestone powder on properties of cement pastes. Constr. Build. …
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In Portland cement concrete, a high content of cementitious materials can cause early cracking. This study investigated the effects of minimised paste volume in structural concrete made with Portland limestone cement and blended aggregates (BA). The effects of using different types of cement and paste volumes were compared. It …
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In this investigation, a comprehensive assessment was conducted on the cooperative effects of Super Absorbent Polymers (SAP), limestone powder, and white cement within the realm of fair-faced concrete. We discerned that while white cement augments the color vibrancy of the concrete, its accelerated hydration rate potentially …
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2.1. Materials. Type I/II-OPC with Blaine fineness of 390 m 2 /kg and Type IL-PLC with Blaine fineness of 450 m 2 /kg were used as binders. Commercially available Type I/II-OPC was used while Type IL PLC was obtained from a local source and was produced by inter-grinding Type I cement clinker with 15% of limestone by weight in …
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Required water:cement ratio to achieve a slump of 60 to 70 mm in concretes made with different cements. Cement E contained a limestone not conforming to the EN 197-1 criteria.
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This study compares the influence of two limestone fineness on strength development and cement hydration. The replacement of clinker by 20% of fine limestone (d v,50 = 2 μm and SSA = 4,21 m 2 /g) gives similar strength development to PC up to 7 days. Fine limestone enhances cement hydration and offsets the dilution effect caused …
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This article investigates the effects of water–cement (w–c) ratio and coarse limestone aggregate type on compressive strength of concrete. In this study, Ceyhan (Adana) limestone produced in quarries was used as aggregate material, and its physical, chemical and mechanical properties were determined. The rock was classified due to …
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This paper aims to optimize high-volume limestone powder in sustainable ultra-high performance concrete (UHPC), and characterize its roles on plasticization effect, hydration kinetics ...
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This study analyses the impact of substituting limestone fillers for cement on the rheological behaviour and drying shrinkage of microconcretes that are used for repair coatings. Three microconcretes were formulated with limestone filler contents of 80%, 60% and 20% by weight in relation of the total fines (cement and limestone filler).
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This study evaluates the efficiency of limestone powder as a partial cement replacement in concrete, and its effects on CO2 emissions and concrete strength. It uses different …
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It is shown that the carbonation of concrete increases with increasing limestone content, within the range permitted by standard BS EN 197-1:2011. This effect, however, is less marked for concrete designed on an equal strength basis to the corresponding Portland cement (PC) concrete than concrete designed on an equal water/cement (w/c) basis.
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