Effect of aggressive pH media on peat treated by cement and sodium silicate grout

Abstract

The effects of aggressive peat nature (pH) on the strength of peat treated by cement and cement-sodium silicate grout were investigated by evaluating the changes in unconfined compressive strength, moisture content, and scanning electron microscopy (SEM) of samples with time in different pH media. The results indicate that peats treated by cement-silicate have higher strength than peats treated by cement, due to an increase in pH value of the media. Furthermore, cement and cement-silicate are highly effective in reducing the moisture content and void ratio of the treated peats. The microstructures of treated peats support the laboratory test results.

The Effect of Cement–Sodium Silicate Grout Compounds on Void Ratio and the Coefficient of Secondary Compression of Treated Fibrous Peat

“…These results agree well with the published results; with the addition of kaolinite and calcium chloride, the adsorption of organic compounds will increase and calcium may create a bridge or connection (mentioned above) between the organic compound and the mineral part of fibrous peat and kaolinite [9,10].…”

“…Huge numbers of poor foundation conditions are reported in all areas of Malaysia where clay, mud, and peat deposits appear. Accordingly, intensive geotechnical research work on soil-improvement techniques in Malaysia is performed at three universities: Universiti Putra Malaysia [7][8][9][10], Universiti Teknologi Malaysia [11][12][13], and Universiti of Malaya [14][15][16]. Peat or peaty soil normally having a high organic matter content is generally associated with high compressibility and a high magnitude and rate of creep [17].…”

Undrained Shear Characteristics of Tropical Peat Reinforced with Cement Stabilized Soil Column

“…The specific surface areas of sapric, hemic and fibrous peat are 96, 73 and 56 m 2 /g, respectively (Table 1). Furthermore, the organic contents in fibrous peat contain substances such as humus and humic acids in large quantity, which act as retarding materials during hydration and other chemical reactions with cement (Kazemian et al 2011c). …”

Physical Properties of Cement-Sodium Silicate Grout with Kaolinite

“…he grout help us to modify the acidic environm change the acidic nature of peat to alkaline to ent. As stated by Kazemian et al (2011), the mical reactions by sodium silicate need hi f Grouts. and pH by presented in e amount of ut Nos.…”