Nanotechnologies in Construction: A Scientific Internet-Journal

52-70

Authors: Ivanov L.A., Muminova S.R.

The new technical solutions including inventions in the area of nanotechnology and nanomaterials are efficiently applied in communal and housing services as well as in construction and other joint fields. The invention «The method to purify surface and underground water from titanium and compounds of it by means of carbon nanotubes and ultrasound (RU 2575029)» refers to absorptive treatment of surface and underground waters with rich content of titanium and its compounds and can be used to obtain safe drinking water. This method includes the contact between polluted water and adsorbent. Carbon nanotubes used as adsorbent are placed into ultrasound bath and then carbon nanotubes with purified water are treated for 1–15 min with frequency 42 kHz and power 50 Watt. The technical result is the 100% purification of the water from titanium and its compounds due to high adsorption parameters of carbon nanotubes.

109-134

Authors: Zaki Saaid I., Hossam A. Hodhod, Mostafa A. Mahdi.

The aim of this work is to study the effect of nanomaterials on the properties of cement paste, the experimental program included three parts: a- two types of nanosilica, locally produced NS1 and imported NS2, b- nanoclay (NC) and c- Hybrid nanoparticles (NS1 & NC). In each part, cement paste was used with different percentages of nanoparticles. Compressive strength and drying shrinkage tests were applied in each part on the cured and uncured samples. The results showed that the compressive strength improved in the cement paste mixtures in the cured condition, the optimum percentages was 1% for NS1, 1% for NS2, 5% for NC, and 5% (0.5%NS1 & 4.5%NC) for hybrid nanoparticles. The drying shrinkage increases with adding nanosilica and hybrid nanoparticles, while it decreases when adding NC.