The need for the use of high strength concrete and tensile steel in Pre stressed concrete
High strength concrete is necessary for prestress concrete as the material offers highly resistance in tension, shear bond and bearing. In the zone of anchorage the bearing stresses being hired, high strength concrete is invariably preferred to minimizing the cost. High strength concrete is less liable to shrinkage cracks and has lighter modulus of elasticity and smaller ultimate creep strain resulting in a smaller loss of prestress in steel. The use of high strength concrete results in a reduction in a cross sectional dimensions of prestress concrete structural element with a reduced dead weight of the material longer span become technically and economically practicable.
Tensile strength of high tensile steel is in the range of 1400 to 2000 N/mm2 and if initially stress upto 1400 N/mm2 their will be still large stress in the high tensile reinforcement after making deduction for loss of prestress. Therefore high tensile steel is made for prestress concrete.
Advantages of PSC construction
In case of fully prestressed member, which are free from tensile stresses under working loads, the cross section is more efficiently utilized when compared with a reinforced concrete section which is cracked under working loads.
The flexural member is stiffer under working loads than a reinforced concrete member of the same length.
Pre tensioning and Post tensioning
Pre tensioning: A method of Pre stressing concrete in which the tendons are tensioned before the concrete is placed. In this method, the prestress is imparted to concrete by bond between steel and concrete.
Post tensioning: A method of pre stressing concrete by tensioning the tendons against hardened concrete. In this method, the prestress is imparted to concrete by bearing.
Tianjin Huayongxin Prestressed Steel Wire Co., Ltd. (hereinafter referred to as "Huayongxin") is a leading professional manufacturer and supplier of PC Steel Wire and PC Steel Strand.
Established in 2004 in Tianjin, close to Tianjin port, Huayongxin cover an area of 120,000sqm, have 4 workshops, 2 laboratories, 8 PC wire production lines and 4 PC strand production lines with each line production capacity at 3000 tons per month.
To further expand the business and provide better services to our foreign customers, we established two trading companies, Tianjin Huashi International Trade Co., Ltd & Tianjin Supcon Trade and Service Co., Ltd, respectively in 2013 and in 2018.
With the great supports from customers abroad, adhering to the principle of Quality First, Service First, our business expands to South Korea, Japan, Southeast Asia countries such as Cambodia, Vietnam, Myanmar, Malaysia and Philippines, Middle East countries, and African countries such as Kenya, Ethiopia, Tanzania, etc., and our products are widely acknowledged by customers for superior product quality and good services.