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Rotary kiln is also known as lime rotary kiln.
Rotation speed:0.1–5 r/min
Applied materials: roasting cement clinker in the industries of metallurgy, refractory matter and chemical plant.
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Vertical Mill 1Cement Vertical Mill 2Coal Vertical Mill 3Raw Vertical Mill 4Slag Vertical Mill As a professional manufacturer and supplier of vertical mill in China, GRADNPLAN can also provide you with various other machines, such as vertical coal mill, jaw crusher, cement production line, cement grinding plant, industrial kiln and furnace, grinding equipment, crushing equipment, environmental
Discover a faster, simpler path to publishing in a high-quality journal. PLOS ONE promises fair, rigorous peer review, broad scope, and wide readership – a perfect fit for your research every time.
This study aims at evaluating the effect of ultrafine granulated copper slag (UGCS) on hydration development of blended cement and mechanical properties of mortars. The UGCS with the median particle size of 4.78 μm and BET surface area of 1.31 m2/g was used as a cement replacement to prepare blended cements. Hydration heat emission of blended cement and mechanical performance of mortars were investigated by using isothermal calorimetry and strength tests, respectively. X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) were applied to the analysis of pozzolanic reaction and hydration products. The results illustrate that UGCS has influence on the hydration heat evolution of blended cement due to its filler effect and pozzolanic reaction. The cumulative hydration heat of blended cement is reduced by partial cement replacement with UGCS. The test mortar prepared by using blended cements with 30 wt. % UGCS shows a retardation of strength development with a low value at early ages (7 days) and a rapid growth at later ages (28 days). The 90-day compressive strength of test mortar is 45.0 MPa close to that of the control mortar (49.5 MPa). The obtained results from XRD and TGA analysis exhibit an increase in calcium hydroxide (CH) consumption and calcium silicate hydrates (C–S–H) formation in blended cement pastes with curing time. The cement replacement with UGCS induces changes in microstructure of blended cement paste and chemical composition of hydration products
Citation: Feng Y, Zhang Q, Chen Q, Wang D, Guo H, Liu L, et al. (2019) Hydration and strength development in blended cement with ultrafine granulated copper slag. PLoS ONE 14(4): e0215677. https://doi.org/10.1371/journal.pone.0215677
Copyright: © 2019 Feng et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Funding: This research was funded by the Fundamental Research Funds for the Central Universities of Central South University, 2016zzts098, to Y.F., and the China Scholarship Council, grant 201606370120, awarded to Y.F. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript
Recently, the utilization of industrial by-products as supplementary cementitious materials (SCMs) in cement and concrete has attracted considerable attention for the technological, economic, and environmental benefits [1–4]. Copper slag is a by-product generated from the process of copper manufacturing . Granulated copper slag (GCS) is an amorphous material due to rapid water cooling, in which the glassy phase consists mainly of ferrous oxide (FeO), silicon dioxide (SiO2), and minor amount of other compounds . The high content of reactive SiO2 in GCS endorse its latent pozzolanic properties . Nevertheless, the low activity of GCS adversely affects the mechanical performance of cement and concrete at early ages when used as partial substitution of cement [8,9]
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