News tagged with cement
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In the most general sense of the word, a cement is a binder, a substance which sets and hardens independently, and can bind other materials together. The word "cement" traces to the Romans, who used the term "opus caementicium" to describe masonry which resembled concrete and was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick additives which were added to the burnt lime to obtain a hydraulic binder were later referred to as cementum, cimentum, cäment and cement. Cements used in construction are characterized as hydraulic or non-hydraulic.
The most important use of cement is the production of mortar and concrete - the bonding of natural or artificial aggregates to form a strong building material which is durable in the face of normal environmental effects.
Cement should not be confused with concrete because the term cement explicitly refers to the dry powder substance. Upon the addition of water and/or additives the cement mixture is referred to as concrete, especially if aggregates have been added.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Imagine what Paula Spurlock must have been going through. Shortly after having a hip replaced in 2011, the trouble started. "I had horrible itching, really bad migraines and intense pain throughout my body," ...
Medical research May 15, 2013 | not rated yet | 0
A team of researchers at the University Department of Orthopaedics at the MedUni Vienna / Vienna General Hospital has for the first time investigated the durability of Zweymüller hip prostheses, which were ...
Surgery Dec 03, 2012 | not rated yet | 0
(HealthDay)—For people with osteoporotic vertebral compression fractures, kyphoplasty (KP) is superior to vertebroplasty (VP) for correcting kyphosis, restoring vertebral height, and preventing leakage ...
Diseases, Conditions, Syndromes Aug 27, 2012 | not rated yet | 0
(HealthDay) -- For postmenopausal women with osteoporosis, bone metabolism and 25-hydroxyvitamin D (25[OH]D) levels are associated with postkyphoplasty recurrent vertebral compression fractures, according ...
Diseases, Conditions, Syndromes Apr 25, 2012 | 4 / 5 (1) | 0
A working group of the International Osteoporosis Foundation (IOF) has issued a literature review of prospective controlled studies comparing the efficacy and safety of two minimally invasive techniques for vertebral augmentation ...
Diseases, Conditions, Syndromes Aug 01, 2011 | not rated yet | 0