Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling heat transfer with molding material
Patent
1982-11-26
1988-09-20
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling heat transfer with molding material
264 401, 264 82, 264333, 264DIG43, 34 26, 34 32, 34 46, 34 50, 34219, F26B 2108, F26B 2110, F26B 2114
Patent
active
047724390
ABSTRACT:
A fast-cure process of manufacturing concrete products of critical shapes and strength requirements such as block, tile and pipe provides substantially maximum strength in a few hours as compared with the many months it would take in an ambient atmosphere. Critical shape is maintained without cracks, etc., by control of temperature, humidity and atmospheric CO.sub.2 within a kiln in which the uncured concrete products reside. The humidity is kept at saturation until substantially all the concrete reacts chemically with the water. The temperature is controlled to prevent excessive temperatures at critical times and to accelerate cure when the products can stand higher temperatures. Free hydrated lime is fast cured by a CO.sub.2 rich atmosphere at elevated temperature.
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"Concrete Products"; Oct. 1981, pg. 72.
"Concrete", Aug. '82, pp. 33-35.
Brown Laurence R.
Lorin Hubert C.
Silbaugh Jan H.
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