Enhanced foam-stabilizing performance by the addition of clays: A comparison of magnesium aluminum silicate with sodium bentonite

Abstract

High-temperature-resistant foam stabilizers are desperately demanded for high-temperature conditions, such as geothermal well. In this study, nano-magnesium aluminum silicate (NMAS) and micro-magnesium aluminum silicate (MMAS) are initially studied and compared with sodium bentonite (Na-BT) as high-temperature-resistant foam stabilizers. We find that increasing temperature could facilitate aggregation of clay dispersion, and the increase of particle size results in significant positive effect on apparent viscosity (AV), interface dilational modulus (E), foam film thickness, and eventually drainage half-life (T 0.5 ) of the foam.Simultaneously, it leads to a negative impact on the initial foam volume (V 0 ) and

Engineering Properties and Applications of Air-Foamed Lightweight Soil

“…A material with a diameter less than 4.75 mm is used to make air-foamed lightweight soil (i.e., fine aggregate) to prevent the resulting soil from being damaged by large particles, which would cause a defoaming phenomenon [29]. Untreated soil construction waste or other novel materials can be used as aggregates [51][52][53][54][55]. Table 1 provides a summary of some lightweight aggregate types and their typical characteristics.…”