Method of forming dense concrete surface layer

Details Method of forming dense concrete surface layer Method of forming dense concrete surface layer

1990-04-05

1991-01-01

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 34, 264 35, 264 69, 264133, 264139, 264162, 264163, 264256, 264333, 404 72, 404 75, B06B 300, B28B 108, B32B 3114, E04B 116

Patent

active

049816268

ABSTRACT:
After a mortar layer is formed on the surface layer of placed concrete, an ultrasonic vibrator is caused to vibrate while being pressed against the mortar layer surface, and a thin surface layer is scraped off, obtaining a dense water-shielding layer. Mortar with a low water-cement ratio is spread onto the surface of the water-shielding layer, and adhesion between the mortar and the water-shielding layer is strengthened by using the ultrasonic vibrator. The pressing force of the ultrasonic vibrator is then increased to make the mortar and the water-shielding layer densely integrated together, thereby forming a hard concrete surface excelling in abrasion resistance.

REFERENCES:
patent: 2999432 (1961-09-01), Ytterberg
patent: 3270113 (1966-08-01), Longinotti
patent: 4134956 (1979-01-01), Suzuki et al.
patent: 4275110 (1981-06-01), Margerie
patent: 4398842 (1983-08-01), Hodson
Compaction of Cement Mixture by Using Ultrasonic Waves Vibrations--author: Iwao Uchizaki, Japan Concrete Industrial Society Yearly Essay Reports, 1989, vol. -11-2, pp. 679-682.
Dry Shakes for Floors--What they will do for Slabs on Grade, and How to Use Them--Concrete Construction/ Mar. 1984.

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