摘要:
The present invention relates to a thermal insulating composition, containing 5 to 60% by weight of a hydrophobized granular material comprising fumed silica and at least one IR-opacifier, and 40 to 95% by weight of an inorganic and/or an organic binder, whereby the hydrophobized granular material has a content of free hydroxyl groups of no greater than 0.12 mmol/g, as determined by the reaction with lithium aluminium hydride.
摘要:
Disclosed is an amphiphilic multifunctional hybrid nanoparticle. The nanoparticle of the present invention has a detachable hydrophilic organic polymer with both a water-soluble long chain and a hydrophobic long hydrocarbon functional group attached to the surface, wherein the body of the nanoparticle is a silica or an organofunctional group substituted silica or an organofunctional group substituted silicon-oxygen bond network, and the nanoparticle contains a free organosiloxane with hydrophobic long hydrocarbon functional groups and a fatty acid or fatty acid ester or aluminum complex of fatty acid with hydrophobic long hydrocarbon functional groups. The nanoparticle can reduce the water permeability of the cement-based material; the cement-based material has the internal hydration products and interfaces are hydrophobized, further reducing the possibility that the harmful particles erode the cement-based material through moisture penetration; furthermore, Si—Al oxides participate is beneficial to the improvement of its mechanical properties.
摘要:
Pre-stressed cementing methods involve preparing a cement slurry containing water, inorganic cement, and capsules of an expanding agent. The slurry is placed in an annular region in the well and hardened. Expansion of the set cement is delayed. Water infiltration activates the expanding agent to rupture the capsules and release the expanding agent. The expanding agent reacts to expand the set cement to a state of compression within the annular region. The state of compression can be maintained during changes in casing dimensions from temperature or pressure, mechanical disturbance, or mud contamination. The state of compression in the annular region may be monitored by acoustic impedance measurements.
摘要:
A process for increasing the hydrophobicity of a porous product by treating the product, or a composition providing for the product, with a water repellent material, characterized in that the porous product or a composition providing the product, is treated with an aqueous suspension of microcapsules where the microcapsules comprise a water repellent organosilicon core material selected from an organosilane, a partially condensed organosilane and a branched siloxane resin, and a shell of a silicon-based network polymer comprising silica units.
摘要:
A coating composition including an inorganic sol material and an organic colorant is applied to mineral particles and cured at a temperature less than 200 degrees Celsius.
摘要:
Materials and methods for implementing engineered aggregates in metamaterials are provided. The engineered aggregates may be tuned to oscillate resonantly under the influence of an external force improving the dynamic performance of the metamaterial by impeding dynamic excitation. The engineered aggregate generally comprise a multilayer resonant structure having at least a relatively heavy inner core surrounded by at least a compliant coating layer. The geometry and stiffness of the relative layers can be tuned to engineer a desired resonant frequency response within the aggregate for a chosen frequency range. The engineered aggregates are disposed in a matrix material to form a metamaterial. The engineered aggregates may be disposed within a mortar matrix to form a concrete metamaterial suitable for use, for example, in structural applications, including bunkers, shelters, etc.
摘要:
A process for making a composite pavement structure comprising primed glass aggregate particles and a polymeric binder composition is disclosed. Systems and methods are also disclosed for the priming of glass aggregate particles. In one embodiment, the glass aggregate particles range from about 0.1 to about 0.5 inch in diameter and are exposed to a coupling agent in solution, for example an aqueous aminosilane solution, in an amount of about 1 to about 10 parts by weight of solution based on 100 parts by weight of the glass aggregate particles wherein the aqueous solution contains about 0.01 to about 5.0 parts by weight coupling agent based on 100 parts by weight of solution. After exposure, the primer is allowed to react and bond with the glass aggregate particles for a predetermined time period to provide primed glass particles, for example silylated glass particles, which are then dried. Once the primed glass and polymeric binder composition are mixed, they are allowed react and bond to provide a composite pavement structure.
摘要:
A use of a surface-functionalised silicic acid, wherein the silicic acid bears on its surface organic multidentate ligands, which can form, as an additive for the resin and/or hardener component in a multi-component reaction resin composition, a chelate complex with metal or metal compounds is provided. Resin and hardener compositions can thus be provided which are storage-stable in the presence of traces of metal compounds.
摘要:
Fibers with crystallization seeds attached to its surface, method of making such composite fibers by surface treatment of fibers followed by either treating such fibers with premade crystallization seeds or by precipitation and direct crystallization of seeds onto pretreated fibers. Controlling and tuning the properties of inorganic binder compositions with fiber-bound crystallization seeds and thereby generating inorganic binder compositions with tailor-made characteristics.
摘要:
The present invention provides a powder mixture suitable for hydrophobizing and thickening cementitious mortars, comprising a) 5-90 wt % of one or more water-thickeners i), said thickener i) being in powder form and selected from a specific group, b) 5-90 wt % of one or more component ii), wherein component ii) is in powder form and comprises one or more components iia) selected from the group of fatty acids, fatty acid salts, fatty acid derivatives, alkyltrialkoxysilane and/or a dialkyldialkoxysilane, wherein the alkyl group being a C6- to C12- alkyl group and the alkoxy group being a methoxy, ethoxy, propoxy and/or a butoxy group, optionally one or more components iib) selected from the group of water-insoluble polymer, water-soluble polymer, carrier and filler, and optionally one or more components iic), and c) 0-70 wt % of adjuvants iii), said adjuvant iii) being in powder form, wherein thickener i), component ii) and adjuvants iii) are different powders and the added components sum up to 100 wt %, based on the total amount of the powder mixture. The invention further provides a process to make a dry mortar comprising a hydraulic and/or latent hydraulic setting binder and the powder mixture according to the invention, wherein the mixture is made first, followed by mixing it with the binder. The powder mixture and the process provide an easy quality control means to ensure the presence of the component in the dry mortar.