Abstract:
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.
Abstract:
By means of this invention, glass beads are coated with natural and organically modified montmorillonite to be competed with commercial products, applied easily, compatible with environmentally friendly water-based road marking paints, have high wear resistance and retoreflectivity. Coated glass beads are spread on the water based paint that is applied on 10 x 50 cm briquettes, soon after the paint applying process. Ratio of glass beads to paint is 33 % by weight. After paint dries, in order to simulate the way, a wheel with 6 bars pressure shuttles on the paint. At the end of this process, night visibilities are measured. After 10.000 cycles of shuttling, night visibility of paint including water based montmorillonite coated glass bead is higher than the paints including commercial silane coated, uncoated and modified montmorillonite coated glass beads. Modified montmorillonite coated glass beads provide similar night visibility when compared to commercial silane based glass bead and higher night visibility than uncoated glass bead.
Abstract translation:通过本发明,用天然和有机改性的蒙脱石涂覆玻璃珠,与商业产品竞争,容易应用,与环保的水性道路标线涂料相容,具有高耐磨性和反射性。 涂料玻璃珠涂布在施涂在10 x 50厘米煤球上的水性油漆上,油漆施工过程不久之后。 玻璃珠与涂料的比例为33重量%。 油漆干燥后,为了模拟方式,一个6巴压力的车轮在油漆上穿梭。 在这个过程结束时,测量夜间视力。 经过10.000次穿梭之后,包括水基蒙脱石涂层玻璃珠在内的涂料的夜间可见性高于包括商业硅烷涂覆,未涂覆和改性的蒙脱石涂层玻璃珠的涂料。 当与商业硅烷基玻璃珠相比,改性蒙脱石涂层玻璃珠提供类似的夜间可见度,并且比未涂覆的玻璃珠具有更高的夜视能力。
Abstract:
The present invention relates to a waterproofing construction method for increasing the heat-insulating effects of a building, and more particularly, to a waterproofing construction method for a building using an expanded perlite composition having heat-insulating effects, as well as improved tensile strength and breaking strength.
Abstract:
Will man nicht alkaliresistente Glasgranulate durch eine farbige Beschichtung als Zuschlagstoff für zementös/hydraulisch gebundene und oberflächenbeschliffene Werksteine oder Terrazzo-Böden geeignet machen, so wird von dieser Beschichtung gefordert, dass sie unlösbar an der Oberfläche der Glaskörner haftet, dass sie eine wirksame Sperre gegen alkalische Einflüsse bildet, dass sie einen starken Haftverbund mit zementös/hydraulisch gebundener Umgebungsmatrix gewährleistet und das all dies bei möglichst geringer Schichtdicke erzielt wird. Die hier vorgestellte Erfindung erfüllt diese Forderungen, indem die Beschichtung des Glaskorns (A) aus einem pigmentierten, ursprünglich wasserbasierten, silanisierten Reaktionsharz (B) besteht, welches mit einer Panzerung aus einander überlagernden, sehr dünnen Muskovit-Glimmerschuppen (C) ausgerüstet und an der Aussenoberfläche (D) mit einem - ggf. pigmentierten - Gemisch aus Zementpulver und Gesteinsmehl umhüllt ist. Diese Umhüllung bewirkt einen fliessenden Übergang von der organisch-polymeren in eine anorganisch-hydraulische Bindungsphase.
Abstract:
Solar-reflective roofing granules having improved solar heat-resistance are formed by coating colored mineral particles with a coating composition including titanium dioxide nanoparticles.
Abstract:
Particulate mineral materials comprising at least one coating comprising at least one metal compound are disclosed. In one embodiment, the at least one metal compound is a metal silicate compound. In another embodiment, the at least one metal compound is a metal oxide compound. In one embodiment, the particulate mineral material is perlite. In another embodiment, the particulate mineral material is perlite microspheres. In a further embodiment, the particulate mineral material is diatomite. Methods of making particulate mineral materials coated with at least one metal compound are also disclosed. In one embodiment, the at least one metal compound may be injected into a perlite expander to form a metal compound coated perlite material. In another embodiment, the at least one metal compound may be applied through a low temperature coating process to the at least one particulate mineral material. Uses for metal compound coated particulate mineral materials are also disclosed.
Abstract:
A method for increasing the strength of the bond between a cementitious layer and a tile or substrate layer, including applying a coating of high-silica glaze to the tile, bonding the high- silica glaze to the tile, bonding the high-silica glaze to the cementious layer, and curing the cementitious layer to yield a high-strength bonded tile system. The high-silica glaze further includes silica and flux. The molar ratio of silica to flux is at least about 5 to 1 and the flux further comprises RO and R2O. The molar ratio of RO to R2O is at least about 7 to 3. RO is selected from the group including CaO, SrO, BaO, ZnO, FeO, PbO and their combinations and R2O is selected from the group including Li2O, Na2O, K2O, and their combinations.
Abstract:
An alkali resistant glass composition having improved durability to withstand highly alkali environments at elevated temperatures, such as curing of cementitious products in an autoclave, is conveniently formed from economical and abundant materials. The glass composition includes increased levels of calcium and iron, and relatively low levels of alkali metals, as compared to many other alkali resistant glass products, and comprises essentially of, by weight, >35% Si2O3, 1-25% CaO, 1-15% Fe2O3, 1-10% R2O, and an amount of Al2O3 such that the ratio of Si2O3:Al2O3 is greater than or equal to 1. Alkali resistance can be improved by forming a passivity layer on the surface of glass articles by treating the articles hydrothermally in a basic environment. Optionally zirconia and/or titania may be added to the composition to further improve alkali resistance.
Abstract translation:通过经济且丰富的材料,可以方便地形成耐高温玻璃组合物,其具有改善的耐久性以耐高温下的高碱性环境,例如在高压釜中固化水泥产物。 与许多其它耐碱玻璃产品相比,玻璃组合物包括增加的钙和铁含量以及相对较低的碱金属含量,并且基本上包含重量比> 35%的Si 2 O 3,1-25%的CaO, 15%的Fe 2 O 3,1〜10%的R 2 O和Al 2 O 3的量使得Si 2 O 3 :Al 2 O 3的比例大于或等于1.耐碱性可以通过在玻璃制品的表面上形成被动层来改善 在基础环境中水热制品。 可选地,氧化锆和/或二氧化钛可以加入到组合物中以进一步提高耐碱性。