海外用リーフレット／ ユニラップ工法
57期 A3 天地297ミリ×左右210ミリ

UNIRAP SYSTEM

Ma                 ,Since 1960 s shotcrete-based grid beam structures have been increasingly installed as one of themajor slope stabilization methods in Japan. As the number of projects increased, demands to install
beams of higher strength at higher places prompted improvement of conventional spray gun based
installation system. UNILAP system was developed by Raito Kogyo to respond to the demands by
combining pumping delivery with shotcrete operation.

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Using newly developed mix propotion with special admixtures, grid beams with a designs strengthof 24MPa are constructed.

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This system minimizes the rebound which causes material loss and product deficiency.

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Using high-head pump and special materials, this system can deliver wet mix to 135m vertically orto 660m horizontally.

 $*+# 3&"%4&"5 %'2# &3 4"# %# Special formwork units help to construct the product being firmly attached to the slope surface.

/ +!&%'!#2 6,'$! 3&" "#,'7,# *+',!- )&$!"&,The material preparation process, including scaling, mixing and pumping, is fully automated toachieve high product quality.
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UNIRAP
Material

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edbyUNIRAP uses plastic mortar/concrete to facilitate pumping delivery. Compressed air is added at the Ybranch near the shotcrete nozzle. Several admixtures, including special RSA agent and high-range AEagent, are added to avoid material segregation during delivery and to increase rheopectic property toprevent sagging/sloughing after placement. Due to the combined effect of the admixtures, the fresh
mortar/concrete loses flowability immediately after shotcreted, to be of medium slump.
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!)(* %) ) 4(5)( (& '(), )*( 66)(6 (Product QualityorAs shown in the photos, a sliced section and coresamples of placed mortar/concrete are fairly
homogeneous and least intervened by defectiverebounds. The high strength property of producthas also been demonstrated from compression
tests and steel-concrete bond strength tests.
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2006.06
6006