Effect of metakaolin and foundry sand on the near surface characteristics of concrete

Durability of metakaolin Self-Compacting Concrete

“…up to 20% or 40% for mk/b and the mk/{mk + lp} respectively, the correlations do not include any turning point (local minimum). The inverse relation between the sorptivity and the compressive strength, as observed by Siddique and Klaus (2011) [50], is also evident in this study for a range of strengths between approximately 60 and 95 N/ mm 2 , regardless of the replacement case (Fig. 8).…”

Effect of two different sources and washing treatment on the properties of UFS by-products for mortar and concrete production

“…Regardless the UFS type and dosage, UFS addition always decreases the compressive strength. The decrease rate is related to the replacement amount as already reported in some literature [15,17,18,22]. The compressive strength decrease is due to the presence of binder in foundry sand composed of a very fine powder of carbon and clay that causes a loose of contacts and links between the cement paste and the aggregate.…”

“…Literature still reports not much works about the reuse of UFS as aggregate for cement -based materials and with discordant results. When UFS is used as a partial sand replacement, some papers report an increase [1,16,19], others a decrease [15,17,18,22], in compressive strength, probably because the casting process and the industry sector from which UFS originates has a strong influence on their physical and chemical characteristics.…”

“…Indeed UFS has been extensively investigated both as a constituent material for controlled low-strength materials [13], for mortar and concrete [14][15][16][17][18][19][20][21][22][23] and self compacting concrete [24][25][26]. However, currently, the percentage of these materials used in cementitious materials is not at the desired sustainable level.…”

Investigación sobre industrias de fundición taiwanesas y de China Continental, a través de análisis espectral

“…Waste foundry sand was found be able to use in manufacturing controlled low-strength materials and concrete (Siddique, Singh, 2011;. Strength, durability and micro-structural properties of concrete made with waste foundry sand were found effective as an alternative material, as partial replacement of fine aggregate in concrete (Siddique, Aggarwal, Aggarwal, Kadri, Bennacer, 2011;Siddique, Kadri, 2011;Kaur, Siddique, Rajor, 2012;Pathak, Siddique, 2012;. 1991(Trading Database, 2006 There is limited study researching the management approach for improving foundry industry development.…”