Chapter 4 Ordinary Concrete

Binding material Concrete Portland cement concrete concrete Gypsum Concrete Asphalt Concrete In Portland cement concrete, the binder is a mixture of Portland cement and water. Asphalt and other cements are used to make various types of concrete, but common usage of the term “concrete” refers to Portland cement concrete. §4.1.4 Classification of Concrete

Concrete Apparentdensity LightweightConcrete Normal concrete Heavy concrete  According to apparent density ρ 0, there are three types of concrete:  Lightweight Concrete  Normal concrete  Heavy concrete Classification of Concrete

Normal concrete:ρ 0 = Kg/m 3 Load-bearing materials Lightweight Concrete:ρ 0 ＜ 1900Kg/m 3 Including: Light aggregate concrete: such as Ceramsite concrete Porous concrete Big hole concrete Heavy concrete: ρ 0 ＞ 2600Kg/m 3 Shielding materials of atomic energy engineering Classification of Concrete

StrengthConcrete Ordinary concrete Super-strengthConcrete High-strengthConcrete Classification of Concrete

 Ordinary concrete  Ordinary concrete: Compressive strength <60 MPa.  High-strength concrete  High-strength concrete: Compressive strength>60 MPa. I t is applied largely to the high- rise building, large span bridge and high-strength prefabrication component and so on.  Super-strength concrete  Super-strength concrete: Compressive strength>80 MPa. O.C H.S.C S.S.C Compressive strength MPa Classification of Concrete

By forming or construction technology:  Deposit concrete  Precast concrete  Premixed concrete  Shotcrete concrete Forming or construction Technology Concrete Classification of Concrete Precast concrete Deposit concrete Shotcrete concrete