Home | ENGINEERING | Portland Puzzolana Cement (IS: 1489 (Part I)

Civil - Construction Materials: Lime, Cement, Aggregates, Mortar

Portland Puzzolana Cement (IS: 1489 (Part I)

   Posted On :  15.07.2016 02:03 pm

It is manufactured by grinding Portland cement clinker and puzzolana (usually fly ash 10-25% by mass of PPC) or by intimately and uniformly blending Portland cement and fine puzzolana.

Portland Puzzolana Cement (IS: 1489 (Part I)

 

Portland Puzzolana Cement (IS: 1489 (Part I): It is manufactured by grinding Portland cement clinker and puzzolana (usually fly ash 10-25% by mass of PPC) or by intimately and uniformly blending Portland cement and fine puzzolana. Puzzolana (burnt clay, shale, or fly ash) has no cementing value itself but has the property of combining with lime to produce a stable lime-puzzolana compound which has definite cementitious properties. Free lime present in the cement is thus removed. Consequently, the resistance to chemical attack increases making it suitable for marine works. The hardening of Portland puzzolana cement consists in hydration of Portland cement clinker compounds and then in interaction of the puzzolana with calcium hydroxide released during the hardening of clinker. At the same time, calcium hydroxide is bound into a water-soluble calcium hydrosilicate according to the reaction with the effect that puzzolana Portland cement acquires greater water-resisting property than ordinary Portland cement.

Ca(OH)2 + SiO2 + (n 1) H2O = CaO.SiO2.nH2O

 

Properties: These have lower rate of development of strength but ultimate strength is comparable with ordinary Portland cement.

Compressive Strength

 72 1 hr    16.0 N/mm2

168 2 hrs 22.0 N/mm2

672 4 hrs 33.0 N/mm2

The initial and the final setting times are 30 minutes (minimum) and 600 minutes (maximum), respectively. The drying shrinkage should not be more than 0.15% and the fineness should not be less than 300 m2/kg.

 

Uses: It has low heat evolution and is used in the places of mass concrete such as dams and in places of high temperature.

 

Tags : Civil - Construction Materials: Lime, Cement, Aggregates, Mortar
Last 30 days 31 views
Related words :

What is Portland Puzzolana Cement (IS: 1489 (Part I) Define Portland Puzzolana Cement (IS: 1489 (Part I) Definition of Portland Puzzolana Cement (IS: 1489 (Part I) where how meaning of Portland Puzzolana Cement (IS: 1489 (Part I) lecturing notes for Portland Puzzolana Cement (IS: 1489 (Part I) lecture notes question and answer for Portland Puzzolana Cement (IS: 1489 (Part I) answer Portland Puzzolana Cement (IS: 1489 (Part I) study material Portland Puzzolana Cement (IS: 1489 (Part I) assignment Portland Puzzolana Cement (IS: 1489 (Part I) reference description of Portland Puzzolana Cement (IS: 1489 (Part I) explanation of Portland Puzzolana Cement (IS: 1489 (Part I) brief detail of Portland Puzzolana Cement (IS: 1489 (Part I) easy explanation solution Portland Puzzolana Cement (IS: 1489 (Part I) wiki Portland Puzzolana Cement (IS: 1489 (Part I) wikipedia how why is who were when is when did where did Portland Puzzolana Cement (IS: 1489 (Part I) list of Portland Puzzolana Cement (IS: 1489 (Part I) school assignment college assignment Portland Puzzolana Cement (IS: 1489 (Part I) college notes school notes kids with diagram or figure or image difference between Portland Puzzolana Cement (IS: 1489 (Part I) www.readorrefer.in - Read Or Refer

​TOP MENU

OTHER SUGEST TOPIC

Recent New Topics :