1. –Mineral Admixture –Ordinary Portland Cement (P.O) –Portland granulated Blast-furnance-slag Cement (P.S) –Portland-Pozzlana Cement (P.P) –Portland fly-ash cement (P.F) –Composite Portland Cement (P.C) Chapter 3 Cement § 3.3 Portland Cement With Mineral Materials

2. It refers to the Fly ash and a little gypsum Quantities of Fly ash is 20% ～ 40% Clinker Fly ash Gypsum Grinding Hydraulic cementing material cementing material P.F What is Portland fly-ash cement

3. Characteristics  Strength is low in the early days and high in the later days  Strong anti-erosion and poor carbonation resistance  Low anti-freezing  Low hydration heat  Temperature sensitivity Similar points

4. Low early-strength –The fly ash form a double cementing action after 1~3 months because the fly ash surface structure is dense. – It is available to the slow construction. Small shrinking, excellent crack resistance, because of dense surface structure and little water absorption. Excellent workability of blended concrete. Characteristics Different points