Reference

Manufacture of post-hardening material

Manufacture of post-hardening material. (Bonex Epitoipari Kozos Vallalat, Hung.). Belg. BE 905501 A1 16 Jan 1987, 13 pp. (Belgium) CODEN: BEXXAL. CLASS: ICM: C04B. 7722-84-1 and 1304-29-6 are cas registry numbers. These chemicals are also mentioned in this article. APPLICATION: BE 21-6 26 Sep 1986. PRIORITY: HU 85-3757 30 Sep 1985. DOCUMENT TYPE: Patent CA Section: 58 (Cement, Concrete, and Related Building Materials) Post-hardening materials are prepd. by mixing an oxygenated water-cement-particulate material mixt. with a peroxide and, optionally, bentonite. A 1-m3 mixt. is prepd. from cement 300-500, clay 50-150, and/or sand 200-400, and optionally, bentonite, 20-150 kg, and 20-50 L 25-30% peroxide, or the corresponding amt. These mixts. are useful for filling open spaces by inspection and for soil stabilization. After setting, they do not shrink. Instead, upon injection, they expand to a significant extent. They set well and are economical. Thus, a sandy, incoherent soil, with a d. of 1500 kg/m3 was injected with a mixt. consisting of 8 L 30% H2O2, 420 kg portland cement C350, 300 kg coarse sand of 0.2-2.0-mm size, and water. The pores were completely filled, and the final strength of the hardened material was higher than that obtained with conventional mortar. .

Highly selective formation of ethane in the reduction of barium peroxide by methane

Highly selective formation of ethane in the reduction of barium peroxide by methane. Sinev, M. Yu.; Korchak, V. N.; Krylov, O. V. (Inst. Khim. Fiz., Moscow, USSR). Kinet. Katal., 27(5), 1274 (Russian) 1986. 1304-29-6 and 74-82-8 are also in the experiment. CODEN: KNKTA4. ISSN: 0453-8811. DOCUMENT TYPE: Journal CA Section: 23 (Aliphatic Compounds) Section cross-reference(s): 22 The title reaction occurs at 3450% to give ethane as the sole C-contg. product. At 600° the yield of ethane was 0.5%. O from the BaO2 participates in the reaction; O from the air is unnecessary. .