Concrete mixing plant of Hebei Tianshan Construction Engineering Co., Ltdis qualified to produce C60 concrete or below grade. Double horizontal shaft vibrating mixers are put into use and the concrete and coal ash are measured by high precision electronic meters. This mixing plant has perfect laboratory equipments and experienced employees’ technical personnel to inspect and design all materials in time. The people have been working in this field for many years, especially with good temperature crack control in large-area construction and high intensity concrete construction.