Rubber elastomer expansion joint used for bridge building

Product Description Rubber bridge expansion joints are mainly made of rubber, steel plate and angle iron. Steel plates are set in the rubber bridge expansion to strengthen the bearing capacity and they can slide freely along the angle iron to meet the expansion deformation of main grid. Because of the excellent sealability and shock-absorbing effect of rubber, rubber bridge expansion joints do well in proofing water and reducing noise. The elasticity of rubber plates and its shear deformation in the telescopic channel helps the whole device to realize telescopic motion.  

Item      Properties		Neoprene ( -25℃~ 60℃)	Natural ( -35℃~ 60℃)	Neoprene ( -40℃~ 60℃)
Hardness (IRHD)		60±5	60±5	60±5
Tensile Strength (Mpa)		≥15	≥16	≥14
Elongation at break (%)		≥ 400	≥ 400	≥350
Brittleness temperature (℃)		≤-40	≤-50	≤-60
Compression set constant (Room temperature×24h)		≤20	≤20	≤20
Resistant Ozone aging (25~ 50pphm) 20% Elongation 40℃×96h		No cracks	No cracks	No cracks
Hot air aging (Compared with previous unaged value occurred biggest change )	Test conditions (℃×h)	70℃×96h	70℃×96h	70℃×96h
	Tensile Strength (%)	±15	±15	±10
	Elongation at break (%)	±25	±25	±20
	Hardness change(IRHD)	0~+10	-5~+10	0~+10
Salt water(23℃×14d, %Concentration)	Volume Change (%)	≤+10	≤+10	≤+10
	Hardness Change(IRHD)	≤+10	≤+10	≤+10
Rubber and steel bonding peel strength(kN/m)		>7	>7	>7
oil resistance(No.1 Standard Oil, 23℃×168h)	Volume Change (%)	-5~+10	<+45	<+45
	Hardness Change(IRHD)	-10~+5	<-25	<-25

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Product Categories : Bridge Road Expansion Joint Series > Rubber Expansion Joint