House roof system can be divided into two sloping roof roofing systems peace. History sloping roof system can be traced back to ancient, cement brick panels, since the dawn of recorded history to the late Qing Dynasty, Xianning cement block, housing construction almost all sloping roof. Foreign generally true, aerated cement blocks, but more features and diversity, if all kinds of pointed roof, the roof and other spheres. Flat roof system is actually evolved from the ancient castle structure, cement walls, along with the development of modern concrete structures in many high-rise buildings has been widely adopted. Our strength grade cement, Portland cement is divided into three levels of six types, 42.5,42.5R, 52.5,52.5R, 62.5,62.5R, other five cement can be divided into three grades six types namely 32.5,32.5R , 42.5,42.5R, 52.5,52.5R. Prior to 1999, the cement division level in accordance with the label and its label sequence and the current intensity level of the corresponding sequence is not critical, but often multiplied by the product of the current intensity level of 10 100 after adding value to find the corresponding relationship in practice ( as 42.5 intensity level corresponds roughly to 525 previously) in order to adapt to this change. Cement brick panels | pavilion cement (certified) | Xianning cement brick by Hongshan District of Wuhan pavilion cement operation. Hongshan District of Wuhan pavilion cement business unit (www.whltsn.com) (www.hbltsn.com) was Wuhan, cement and products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Cement leader in the pavilion with the staff warmly welcome all inquiries negotiations to create a better future for cement pergola.