Refractory cement
The refractory cement require refractoriness of 1580℃ and above. There are various types of refractory cement, such as high alumina cement, calcium aluminate cement, phosphate refractory cement, calcium magnesium aluminate cement, etc.Refractory cement, also known as furnace cement, fire ceme
Send inquiryThe refractory cement require refractoriness of 1580℃ and above. There are various types of refractory cement, such as high alumina cement, calcium aluminate cement, phosphate refractory cement, calcium magnesium aluminate cement, etc.
Refractory cement, also known as furnace cement, fire cement, high-temperature cement, etc. the refractory cement is a hydraulic binder produced by burning and grinding clinker of bauxite and lime.
How to Build
High alumina cement is common among all types of refractory cement, so we study refractory cement based on the data of high alumina cement.
Table1: composition of high alumina cement
| Constituents | Silica | Alumina | Lime | Iron Oxide | Titanium | Magnesium | Insoluble Resides |
|---|---|---|---|---|---|---|---|
| Content Percentage | 3-8% | 37-41% | 36-40% | 9-10% | 1.5-2% | 1% | 1% |
High alumina cement manufacturing process can begenerally divided into five steps as follows:
Crushing
Raw meal grinding
Clinker calcining
Cement grinding
Storing or bagging
Fast setting early strength
Large hydration heat & Good heat resistance
Fast setting early strength
Fast setting early strength
Industry Applications
High aluminum cement is not suitable for neither mass concrete projects, nor long-term load-bearing structures and projects in high temperature and humidity environments, projects in contact with alkaline solutions. It should also be noted that high aluminum cement products can not be steam curing.
In addition, without test, high alumina cement can’t mix up with cementingmaterial that can precipitate calcium hydroxide , such as Portland cement or lime, even avoiding contact in the process of mixing and placing concrete. High alumina cement shall not contact with Portland cement that has not yet hardened, avoiding intensity drops, and shorten the setting time, even instantaneous condensation phenomenon.
Because the strength of aluminate cement concrete decreases greatly in the later period, the design should be based on the minimum stable strength,whose value is determined by the test according to relevant regulations
