Reference

Agents for mortar with high adherence

Agents for mortar with high adherence. (Idemitsu Petrochemical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59069459 A2 19 Apr 1984 Showa, 2 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C04B013-28. APPLICATION: JP 82-178280 13 Oct 1982. DOCUMENT TYPE: Patent CA Section: 58 (Cement, Concrete, and Related Building Materials) The title agents are composed of the condensation product of (1) naphthalenesulfonate and/or alkylnaphthalenesulfonate and (2) formalin. The agents improve adhesion of the mortar and are esp. useful in lining tunnels and underground petroleum storage tanks. Thus, naphthalene was sulfonated, condensed with HCHO, neutralized with Ca(OH)2, and adjusted to pH 9 with NaOH to give a b-naphthalenesulfonic acid-HCHO condensation product Na salt [36290-04-7] (no.-av. mol. wt. 1700) which was used to improve the adhesion of mortar contg. ordinary portland cement.

Rapid set lightweight cement product

Rapid set lightweight cement product. Miller, Richard; Rizer, Janine M. (Research One Ltd. Partnership, USA). U.S. US 4501830 A 26 Feb 1985, 3 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C04B007-02; C04B007-32; C04B007-35; C08G051-24. NCL: 523401000. APPLICATION: US 84-568358 5 Jan 1984. DOCUMENT TYPE: Patent CA Section: 58 (Cement, Concrete, and Related Building Materials) Cementitious products which have d. <90 lb/ft3 and achieve tensile strengths of 3600 psi and compressive strengths of 36000 psi after curing 1 day at 60° are prepd. from a class H portland cement 35-45, a mixt. of condensed SiO2 fume, fly ash cenospheres, and finely divided cryst. SiO2 38-50, an epoxy emulsion with curing agent and accelerator 10-15, and water 5.5-15 wt.%. Thus, class H cement 616, SiO2 fume 84, finely divided SiO2 300, fly ash cenospheres 280, epoxy emulsion 105, a polyoxypropylene amine curing agent 25, a cure accelerator 5, Mighty 100P [36290-04-7] 12, Nopco NZ2 [12794-56-8] defoaming agent 1, and distd. H2O 100 wt. parts, having water/cement ratio 0.24, resin/cement ratio 0.085, and aggregate/cement ratio 1.07, were mixed according to ASTM C-305 and molded. After curing for 1 day in a steam box at 60°, the product had compressive, tensile, and flexural strengths 6533, 610, and 1248 psi, resp., and d. 87 lb/ft3.