Chapter 4Chapter 4
Ordinary ConcreteOrdinary Concrete
BindingBinding material materialBindingBinding material materialConcreteConcreteConcreteConcrete
Portland cementPortland cement
concreteconcrete
Portland cementPortland cement
concreteconcrete
Gypsum ConcreteGypsum ConcreteGypsum ConcreteGypsum Concrete
Asphalt ConcreteAsphalt ConcreteAsphalt ConcreteAsphalt 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§4.1.4 Classification of Concrete§4.1.4 Classification of Concrete§4.1.4 Classification of Concrete
ConcreteConcreteConcreteConcrete
ApparentApparent
densitydensity
ApparentApparent
densitydensity
Lightweight Lightweight
ConcreteConcrete
Lightweight Lightweight
ConcreteConcrete
Normal concreteNormal concreteNormal concreteNormal concrete
Heavy concreteHeavy concreteHeavy concreteHeavy concrete
According to According to apparent density ρapparent density ρ0, 0,
there are three types there are three types of concrete:of concrete:
Lightweight ConcreteLightweight ConcreteNormal concreteNormal concreteHeavy concreteHeavy concrete
Classification of ConcreteClassification of ConcreteClassification of ConcreteClassification of Concrete
Normal concrete:ρ0=2000-2500Kg/m3
Load-bearing materials Lightweight Concrete:ρ0 < 1900Kg/m3
Including:Light aggregate concrete: such as Ceramsite con
crete Porous concreteBig hole concrete
Heavy concrete: ρ0 > 2600Kg/m3
Shielding materials of atomic energy engineering
Classification of ConcreteClassification of ConcreteClassification of ConcreteClassification of Concrete
StrengthStrengthStrengthStrengthConcreteConcreteConcreteConcrete
Ordinary concreteOrdinary concreteOrdinary concreteOrdinary concrete
Super-strengthSuper-strength
ConcreteConcrete
Super-strengthSuper-strength
ConcreteConcrete
High-strength High-strength
ConcreteConcrete
High-strength High-strength
ConcreteConcrete
Classification of ConcreteClassification of ConcreteClassification of ConcreteClassification of Concrete
Ordinary concreteOrdinary concrete: Compressive strength <60 MPa. High-strength concreteHigh-strength concrete: Compressive strength>60 MPa.
It is applied largely to the high- rise building, large span bridge and high-strength prefabrication component and so on. Super-strength concreteSuper-strength concrete: Compressive strength>80 MPa. O.CO.C
H.S.CH.S.C
S.S.CS.S.C
Compressive strengthCompressive strengthCompressive strengthCompressive strength
6060
8080
MPaMPaMPaMPa
Classification of ConcreteClassification of ConcreteClassification of ConcreteClassification of Concrete
By forming or construction
technology: Deposit concrete Precast concrete Premixed concrete Shotcrete concrete
Forming or constructionForming or construction
TechnologyTechnology
Forming or constructionForming or construction
TechnologyTechnologyConcreteConcreteConcreteConcrete
Classification of ConcreteClassification of ConcreteClassification of ConcreteClassification of Concrete
Precast concrete
Deposit concrete
Shotcrete concrete