Limestone is commonly used in cement concrete due to its unique nature and type. It has physical effects (nucleation effect and dilution effect) and chemical effects on the hydration process of cement.
WhatsApp: +86 18221755073Recent research endeavors in cement production have pivoted towards mitigating its environmental footprint. A promising alternative explored in these efforts is limestone, which offers distinct advantages in terms of structural purity, availability, and cost-effectiveness compared to traditional cement.
WhatsApp: +86 18221755073Obtained results indicate that both tensile and compressive strength decreases with the increase of the limestone content in cement. Limestone can worsen or improve workability, depending on...
WhatsApp: +86 18221755073Using LS to replace cement reduces the properties of the concrete. Limestone powder (LS) is one of the mineral materials in concrete due to its wide availability and low …
WhatsApp: +86 18221755073The benefits of limestone waste as a partial replacement of cement have been well established. In this paper, to better understand the effect of limestone waste on the …
WhatsApp: +86 18221755073Limestone calcined clay cement (LC3) is emerging as an alternative to Portland cement, offering economic advantages, reduced CO2 emissions, and mechanical properties on par with Portland cement. Central to the effective utilization of LC3 is understanding how the fineness of its components affects its performance. The current study investigates limestone …
WhatsApp: +86 18221755073Comparison of the water:cement ratios for 0% and 5% limestone contents shows that the poor quality limestone did not affect the water demand for the 5% limestone cement, but had a deleterious ...
WhatsApp: +86 18221755073Cement properties, including chemical and physical properties and mortar properties, such as compressive strength, drying shrinkage, and sulfate expansion were investigated comprehensively for...
WhatsApp: +86 18221755073Using LS to replace cement reduces the properties of the concrete. Limestone powder (LS) is one of the mineral materials in concrete due to its wide availability and low cost. This paper discusses effects of LS on the workability, setting time, shrinkage, mechanical properties and durability of concrete.
WhatsApp: +86 18221755073To assess the dilution effect, a modification to Féret's equation is used to calculate an efficiency factor for the limestone powder when compared to cement. To measure the environmental impact, a life cycle assessment is conducted on concrete …
WhatsApp: +86 18221755073The benefits of limestone waste as a partial replacement of cement have been well established. In this paper, to better understand the effect of limestone waste on the properties of cement-based materials, the hydration process …
WhatsApp: +86 18221755073The objective of this study is to investigate the performance of normal- and high-strength concretes including limestone powder (LP) through their mechanical properties. Moreover, sustainable flat plates made of these concretes were investigated through their punching strength. For this purpose, two different types of concrete (normal- and high …
WhatsApp: +86 18221755073This modulatory effect of limestone powder mitigates the adverse influence of SAP on the mechanical characteristics of white fair-faced concrete, culminating in enhancements in both compressive and tensile strengths. ... White cement and limestone powder react with water in the presence of moisture, forming hydrated calcium silicate (C-S-H) and ...
WhatsApp: +86 18221755073As the surface area increases, water absorption increases. Increasing the fineness of the cement or limestone will add more surface area. Water absorption will therefore increase and bleeding will decrease. The use of limestone in the cement can slightly decrease bleeding based on its fineness but generally does not have an effect. Set Time ...
WhatsApp: +86 18221755073Limestone is commonly used in cement concrete due to its unique nature and type. It has physical effects (nucleation effect and dilution effect) and chemical effects on the hydration process of cement.
WhatsApp: +86 18221755073Recent research endeavors in cement production have pivoted towards mitigating its environmental footprint. A promising alternative explored in these efforts is limestone, which …
WhatsApp: +86 18221755073All mixtures contain paste with cement, silica fume and a water/binder ratio of 0.38 by mass. The concrete composition consists of 47 vol.% paste and 53 vol.% aggregates. The replacement of the cement by limestone powder and the amount of PCE was adapted according to the investigations. In a first step, we investigated the influence of
WhatsApp: +86 18221755073This 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.
WhatsApp: +86 18221755073This paper aims to optimize high-volume limestone powder in sustainable ultra-high performance concrete (UHPC), and characterize its roles on plasticization effect, hydration kinetics ...
WhatsApp: +86 18221755073Good results are achieved by using limestone in the technology of self-compacting concretes, in which it is important to ensure proper rheological properties (as low as possible yield stress …
WhatsApp: +86 18221755073The limestone acts as a seed crystal for the cement, better distributing the reaction products and increasing the reactivity of the cement. As there is always unhydrated cement in the concrete, this change will have no …
WhatsApp: +86 18221755073Vijayalakshmi et al. confirmed that LP content within 15% had no adverse effect on concrete strength. Nikbin et al. showed that as the LP content ... Poon C.S. Heat of hydration of Portland high-calcium fly ash cement incorporating limestone powder: Effect of limestone particle size. Constr. Build. Mater. 2014; 66:410–417. doi: 10.1016/j ...
WhatsApp: +86 18221755073Due 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 ...
WhatsApp: +86 18221755073Cement properties, including chemical and physical properties and mortar properties, such as compressive strength, drying shrinkage, and sulfate expansion were investigated comprehensively for...
WhatsApp: +86 18221755073Finally 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 ...
WhatsApp: +86 18221755073There is the need to compare the effect of Portland-limestone cement grades 32.5 and 42.5 on the compressive strength of concrete because unlike the comparison of the effect of OPC grades 32.5 and 42.5 on concrete compressive strength which …
WhatsApp: +86 18221755073Using limestone powder (LP), the by-product of manufactured sand, to replace part of fly ash (FA) or manufactured sand could not only turn waste into treasure and decrease the price of concrete, but could also enhance the performance …
WhatsApp: +86 18221755073Good results are achieved by using limestone in the technology of self-compacting concretes, in which it is important to ensure proper rheological properties (as low as possible yield stress and adequate viscosity) ensuring the possibility of self-compacting [1].
WhatsApp: +86 18221755073Obtained results indicate that both tensile and compressive strength decreases with the increase of the limestone content in cement. Limestone can worsen or improve workability, depending on...
WhatsApp: +86 18221755073To assess the dilution effect, a modification to Féret's equation is used to calculate an efficiency factor for the limestone powder when compared to cement. To measure the environmental impact, a life cycle assessment is conducted …
WhatsApp: +86 18221755073