Rubber dam is made of high-strength synthetic fabrics and compound rubber, anchored in the concrete foundation to form a sealed air bladder inflated with water or air in dry seasons to store water. In rainy seasons, water or air inside of rubber bladder would be discharged to help release floodwater from river course. Compared with common civil works, the advantages of rubber dam are less engineering budget, shorter construction period, extended service life, simplified maintenance and improved vibration resistance. Rubber dam can be adjusted at any height and overflowed so it is widely used for irrigation, power generation, flood control and urban landscaping in many areas.

The rubber bladder is made of strength canvas and rubber layers. The canvas serves as the force-bearing frame of the dam with good flexural stress resistance and excellent adhesion function. The rubber layers consist of out-layer, middle-layer and inner-layer to protect the canvas.

Physical and mechanical properties of the rubber material for making rubber bladder

Item		Unit	Outer layer	Middle layer,Inner layer	Cover rubber sheet	Test standard
Tensile strength at break≥		Mpa	14	12	6	GB/T528-2009
Elongation at break≥		%	400	400	250	GB/T528-2009
Permanent deformation at break≤		%	30	30	35	GB/T528-2009
Hardness(shore A)		.	55~65	50~60	55~65	GB/T531.1-2008
Brittleness temperature≤		°C	-30	-30	-30	GB/T1682-1994
Hot air aging (100°C*96h)	Tensile strength at break≥	Mpa	12	10	5	GB/T3512-2001
	Elongation at break≥	%	300	300	200	GB/T3512-2001
Hot water aging (70°C*96h)	Tensile strength at break≥	Mpa	12	10	5	GB/T1690-2010
	Elongation at break≥	%	300	300	200	GB/T1690-2010
	Volume expansion ratio≤	%	15	15	15	GB/T1690-2010
Ozone aging: 10000pphm, temperature 40°C, stretching 20%, no cracking		min	120	120	100	GB/T7762-2003
Wear loss( Akron) ≤		cm³/1.61km	1.0	1.0	1.2	GB/T1689-1998
Flexibility, no cracking		Ten thousand times	20	20	20	GB/T3934-2006

As the major products of our company, water filling rubber dams are produced with advanced technology.

Clamping plate:

1,having good rust resistance, and the specifications apply to a wide range of models2,having high standard and exquisite casting3,having high strength and high safety factor4,easy installation and low price5,customer’s requirement is promised

Auotomatic contro system

Our company has offered more than 1000 rubber dams throughout China and in Vietnam, Bangladesh and Iran and Indonesia and ect. Our company attaches significance to customer satisfaction and credit business philosophy and offers quality products and reliable after-sales services to customers.

Customers can choose different types for different needs, and we can supply customers with technical materials and special support .