Obayashi Corporation

Nichireki Co., Ltd.

Toho Natural Gas Company, Limited

Fujisawa Pharmaceutical Company, Ltd.

Daicel Corporation

Trio Kabushiki Kaisha

Ohbayashi-gumi, Ltd.

Yoshimasa Hayashi

Tsuyoshi Aoyama

Hiroyuki Ishii

Akira Ito

Haruka Ogawa

Hitofusa Mitani

Kazuhiko Shichiku

Kiyoshige Nishibayashi

Tadashi Nouchi

Atsushi Ogawa

Hirotaka Toba

Akira Yoshida

Kenji Goto

Motoaki Kawakama

An object of the invention is to provide a rubber modified asphalt type of waterproofing composition which can be used in a normal temperature type of spray waterproofing method and can find its application in waterproofing, moisture-proofing, rustproofing, and filling buildings and structure for engineering works, said waterproofing composition coagulates instantaneously to form a stable yet firm waterproofing layer. This rubber modified asphalt type of waterproofing composition comprises a cationic rubber modified asphalt emulsion and an organic coagulating agent.

Rubber modified asphalt type of water-proofing compositions

Rubber modified asphalt type of water-proofing composition

A sampling pulse generator circuit for a stereo demodulator circuit of a sample and hold system is disclosed. The pulse generator circuit uses pilot signals of an FM stereo broadcast as an input and produces output sampling pulses, which are phase-synchronized to the stereo subcarrier but have a 180.degree. phase difference to each other. The pulse generator circuit comprises a phase lock loop circuit having a multiple number of frequency dividers arranged in cascade. Selected outputs of these frequency dividers are logically summed to produce the output sampling pulses with a predetermined and stable pulse width.

Sampling pulse forming circuit for FM stereo demodulator

An exposed aggregate finishing method for concrete. The method comprises coating the inside faces of a form for concrete with a cement setting retarder, drying, coating the dried faces with a synthetic organic polymer coating material which is soluble in an aqueous alkaline solution of cement, but is insoluble in water; and drying the coated faces. Alternatively, the method may be carried out by coating the inside faces of the form for concrete with the mixture of the cement setting retarder and the organic polymer coating material and drying the coated faces. Concrete is thereafter placed in the concrete form, the form removed and the surface of the molded concrete washed to make the surface rough.

Exposed aggregate finishing method for concrete

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Tokyo, Japan

Yoshimasa Hayashi