Properties of Calcium Acetate Manufactured with Etching Waste Solution and Limestone Sludge as a Cementitious High-Early-Strength Admixture

Abstract

Concrete is one of the most widely used construction materials. There are several methods available to improve its performance, with one of them being the use of high-early-strength admixtures (HESAs). Typical HESAs include calcium nitrate, calcium chloride, and calcium formate (CF). Industrial by-products, such as acetic acid and lime stone sludge (LSS), can be used together to produce calcium acetate (CA), which can subsequently be used as a cementitious HESA. In this study, calcium carbonate and LSS were mixed with cement in weight ratios of 1 : 1, 1 : 1.5, and 1 : 2, and the properties of the as-produced CA were evaluated. CA and CF were mixed with cement in different weight ratios (0, 1, 2, and 3 wt%) to obtain CA- and CF-mortars, respectively. The flow behavior, setting time, pH, and compressive strength of these mortars were evaluated, and their X-ray diffraction patterns were also analyzed. It was found that as the CF content in the CF-mortar increased, the initial strength of the mortar also increased. However, it impaired its long-term strength. On the other hand, when 1% CA was mixed with cement, satisfactory early and long-term strengths were achieved. Thus, CA, which is obtained from industrial by-products, can be an effective HESA.

Simple and Rapid Synthesis of Calcium Acetate from Scallop Shells to Reduce Environmental Issues

“…CA has been extensively reported as a promising chemical for environmental and industrial applications [28]. CA can be used in the environmental field, as the best alternative material for replacing the corrosive and environmentally unacceptable deicers (sodium chloride and calcium chloride) [23], as a powerful SO 2 , NO X , and toxic particulate emission control agent in coal combustion processes to reduce acid rain [29], as an effective catalyst for the facilitation of coal combustion [30], and as an adsorbent of carbon dioxide [31].…”

Steel-Corrosion Characteristics of an Environmental Inhibitor using Limestone Sludge and Acetic Acid

“…Earlier work confirmed that mixing 1% calcium acetate manufactured from limestone sludge with 1 wt% cement could accelerate the hydration of cement and improve its early strength (Kim et al 2016). Figure 1 shows the corrosion characteristics of several types of inhibitors against chloride ions.…”

Bio-green synthesis of calcium acetate from oyster shell waste at low cost and reducing the emission of greenhouse gases

“…Calcium acetate was used as a promising chemical for environmental and industrial applications [25]. In the environmental eld, it was employed as an alternative compound to replace corrosive deicers with environmentally unacceptable properties such as calcium chloride (CaCl 2 ) and sodium chloride (NaCl) [26].…”