Abstract:
The present invention provides a composition for forming a lightweight, low shrinkage and hydrophobic cementitious matrix, and a method for preparing thereof. The present cementitious matrix formed by the composition is lightweight, hydrophobic (or water repelling) and with low shrinkage which is useful in building and construction industry as non-structural wall resistant to water, heat and sound entry. The present invention also provides a method of preparing the composition and the cementitious matrix formed from the composition.
Abstract:
The present invention provides a self-reference and tunable optical displacement transducer comprising an optical splitter, at least one transducing element and a self-reference element, where each of said transducing element and said self-reference element comprises a pair of optical fibers and a reception assembly between each pair of the optical fibers. One of the reception assembly and the second optical fiber of the transducing element are displaceable along the same axis and relatively with respect to each other while another reception assembly and the second optical fiber of the self-reference element are non-displaceable. Incorporation of the self-reference element into the present transducer enables monitoring and measuring crack size and integral strength of a structure without being affected by other environmental or external factors.
Abstract:
The present invention relates to a method of producing a water repelling surface or imparting hydrophobicity onto a surface comprises applying a polymer-based coating composition. The water repelling surface or the hydrophobic surface imparted by the present method has at least 90° of water contact angle. The water repelling surface or the hydrophobic surface imparted by the present method is preferably on a concrete surface. The present method imparts hydrophobicity onto surfaces that are durable without an additional primer layer between the surfaces and the coating composition.