ACI Global Home Middle East Region Portal Western Europe Region Portal
In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Learn More
Become an ACI Member
Topics In Concrete
Home > Frequently Asked Questions
In This Section
Frequently Asked Questions
Submit a Question
Search other resources on the ACI website for answers to technical questions
Q. How much water goes into combination with the cement during the hardening of concrete? A. For complete hydration of portland cement, the w/cm is about 0.4 by mass. Only 0.2 unit of water by mass combines chemically with cement during hydration. Hydration product has about 30% pore space, and water needs to be available to fill it, which requires the other 0.2 unit of water. References: SP-1(02) Topics in Concrete: Concrete Fundamentals
Q. How much water goes into combination with the cement during the hardening of concrete?
A. For complete hydration of portland cement, the w/cm is about 0.4 by mass. Only 0.2 unit of water by mass combines chemically with cement during hydration. Hydration product has about 30% pore space, and water needs to be available to fill it, which requires the other 0.2 unit of water.
References: SP-1(02)
Topics in Concrete: Concrete Fundamentals