— The article deals with adverse effects of using metallurgical slags in concrete. Despite a very long list of references, the article itself is rather sketchy.

 — The present study investigates the potential of carbonation-cured belite-rich cement (BRC) to resist magnesium sulfate (MgSO 4) and sulfuric acid (H 2 SO 4) environments. BRC mortar was submerged in 5% and 10% MgSO 4 and H 2 SO 4 solutions. The gains of the compressive strength and mass under MgSO 4 environment …

 — Belite-calcium sulfoaluminate (Belite-C 4 A 3 $) cement is one type of low-calcium clinker with good long-term compressive strength and durability. Yet, its early mechanical property is lower than P·І 42.5. In this paper, the effect of strontium slag on the preparation and performance of belite-C 4 A 3 $ cement was investigated. Moreover, the …

 — The environmental impact of concrete containing pure cement has been reduced by the following ranges when utilizing 10 to 20 percent fly ash as a replacement to cement in concrete: 2.16–18.65% ...

Since the late 1950s, use of slag cement as a separate cementitious material added at the concrete mixer with portland cement has gained acceptance in South Africa, Australia, …

DOI: 10.1016/J.JCLEPRO.2020.124447 Corpus ID: 224879032; Recycling of steel slag aggregate in portland cement concrete: An overview @article{Dong2020RecyclingOS, title={Recycling of steel slag aggregate in portland cement concrete: An overview}, author={Qiao Dong and Guotong Wang and Xueqin Chen and Juan Tan and Xingyu …

Some cement firms add 1-3% copper slag as an additive during the manufacture of their cement. They intend to obtain a simple cheap green resource of iron by recycling copper slag. Note that copper ...

 — The chemical composition of cement and slag is presented in Table 1, revealing highest content of CaO in both cement and slag, followed by SiO 2. Additionally, ... The strength enhancement by NS in pure cement even demonstrated adverse effects on strength development during the 28-day hydration period. However, the beneficial …

 — Effect of waste concrete powder on slag-based sustainable geopolymer composite mortars. E. H. Alakara Özer Sevim I. Demir Gazi Günel. Materials Science, Environmental Science ... and its adverse effects become more evident with each passing day. Although it is known that the use of alternative binder materials in … Expand [PDF]

 — It slag can be used as a construction material, such as in the production of steel slag cement [28, 29], concrete admixtures [30, 31], and building material products, among other things; ... Steel slag can have specific adverse side effects, such as soil hardening or heavy metal contamination, when used over an extended time. ...

 — It is noteworthy that these values considered the filler effect provided by the slag in the system, which have been discounted in our case. ... Mechanisms of enhancement in early hydration by sodium sulfate in a slag-cement blend – insights from pore solution chemistry. Cement Concr. Res., 135 (November 2019) (2020), …

 — At lower water-binder ratios, however, the adverse effects of steel slag on the strength of compression, penetrability, and the carbonation resistance of concrete were less pronounced. When the W/B was high early in the drying process, steel slag accelerated shrinkage, but it had no impact on the final shrinkage at 90 days.

 — One drawback of slag-modified concrete is that at temperatures below 23 °C, the setting time of the slag-modified concrete is significantly delayed, compared with that …

 — Overall, given its tendency to the adverse effects of acids and sulfates, RHA could be an effective alternative to cement [34, 39]. The mechanical strength of the SCC mixture was also evaluated ...

 — Steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag are the most common metallurgical slags that could be used as supplementary cementitious materials (SCMs) and aggregates. However, they have some adverse effects that could significantly limit their applications when used in cement-based materials.

 — A CEM I 52.5 N Portland cement complying with BS EN 197–1, with a particle density of 2.7–3.2 g/cm 3, supplied by Hanson Limited, UK, was used.The ground granulated blast furnace slag (GGBS), which is a low-carbon and environmentally-friendly cement substitute, used in this study was Regen GGBS with a particle density of around …

 — The strength increase with age depends on the characteristics of the used cement. Due to the high slag content in BFC cement, for mix BFC450-0.4, the 180 strength was about 124%; however, for other types of cement with fixing other parameters, the 180 strengths were 107% and 115% for CEM I and SRP cement, respectively.

Supplementary cementing materials. Daman K. Panesar, in Developments in the Formulation and Reinforcement of Concrete (Second Edition), 2019 3.3.2 Slag cement. Although slag cement has been reported to improve workability, increase cohesiveness, and reduce water demand, the angular and irregular slag cement particles do not benefit …

 — As shown in Fig. 9, the early compressive strength of the concrete with steel slag is lower than that of the pure cement concrete, indicating that the positive effect of lowering W/B on the early strength is weaker than the adverse effect of steel slag. The concretes with 15% and 30% steel slag have similar early compressive strengths.

 — Ground granulated blast furnace slag is an eco-friendly material with regard to its production process and usage. In this study, slag cement (SC) is used to prepare different slag cement mortar (SCM) mixes to study mortar microstructure perspectives, physiochemical properties, mechanical properties and durability performance. The tests …

 — The environmental impacts of mass concrete mixtures with 65% ground-granulated blast furnace slag (65GGBS) and 50% fly ash (50FA) as cement replacement …

 — This paper, from the perspective of the precast industry, reports on a study into the activation of mortar mixes with ground granulated blast furnace slag (GGBS) (0, 30, 50, 70%) and cement (CEM I 42.5R) using temperature (ambient (20 °C) and moderate (35 °C)) and accelerating admixtures (a novel chloride free activator and a commercial …

 — Moreover, the content of Al 2 O 3 also influences the sulfate resistance of slag concrete. The influence of MgO as a replacement of CaO seems depending on both the basicity and the MgO content of slag. Variations in the MgO content up to 8-10% may have little effect on strength development, but high content have an adverse effect.

 — In this work, the effect of slag with different particle size on the workability, mechanical properties, and hydration products of MKPC was investigated. The results showed that the compositions of slag in …

 — The precursor material of AAS cement in the paper was ground granular blast furnace slag (GGBFS). Its density and specific surface area were 2.87 g/cm 3 and 435 m 2 /kg. According to the mass percentage of chemical composition in Table 1, its basicity coefficient was 1.05 calculated by ((CaO + MgO)/(SiO 2 +Al 2 O 3)).According to …

 — Line 201: is there incompatibility metallurgical slag-cement? Please clarify; Line 276: MPa instead of Mpa; Line 311: Not all SS have high CaO free, it is mainly the BOF slag ... Maharishi et al. [113] found that the adverse effect of CS on concrete was particularly significant when the content of CS exceeded 40%." (page 10, line 249-255)

 — The analysis results indicate that the incorporation of steel slag powder (SSP 3) may have adverse effects on the initial setting time, volume stability, compressive …

 — Dust emissions are a major source of environmental pollution during cement manufacturing, for example, dust is generated during transportation, loading and unloading of the clinker to be deposited outside the silo [23], [24].CO 2 is indeed one of the major greenhouse gas emissions which also a major contributor to global warming [22].During …

 — The metakaolin observed to improve the concrete mechanical properties 35,36 that minimized the adverse effects produced by traditional mineral admixture (ordinary coal fly ash and blast furnace ...

DOI: 10.1016/j.conbuildmat.2019.117983 Corpus ID: 212772984; A ternary optimization of alkali-activated cement mortars incorporating glass powder, slag and calcium aluminate cement