Methods of forming synthetic aluminosilicate material are disclosed. Exemplary methods include forming a polymer solution, adding an aluminum precursor to the polymer solution, adding a silicon precursor to the polymer solution, forming a gel from the polymer solution, calcining the gel to form an aluminosilicate powder, and grinding the aluminosilicate powder to form ground aluminosilicate material. The synthetic aluminosilicate material can be used in the formation of cement and concrete.

Methods of forming synthetic aluminosilicate material are disclosed. Exemplary methods include forming a polymer solution, adding an aluminum precursor to the polymer solution, adding a silicon precursor to the polymer solution, forming a gel from the polymer solution, calcining the gel to form an aluminosilicate powder, and grinding the aluminosilicate powder to form ground aluminosilicate material. The synthetic aluminosilicate material can be used in the formation of cement and concrete.

Disclosed is a CO.sub.2 solidified fiber cement board and its preparation method. The matrix composition of the fiber cement board prepared in this disclosure is calcium carbonate, which has high compactness, and the crystal form of calcium carbonate is adjusted by adding shell powder to improve the toughness of the matrix, so that the fiber cement board has excellent mechanics and durability performance. In addition, the preparation process does not require high temperature maintenance, and has the characteristics of normal temperature preparation, which creates conditions for the introduction of organic synthetic fibers, so that the organic synthetic fibers can further improve the brittleness of cement fiberboard. While reducing energy consumption, the preparation process can also effectively solve the problem that excessive pressure is easily generated in the fiberboard under high temperature conditions in the existing high-temperature and high-pressure curing process.

The invention provides cement additives comprising calcium sulfate and silica which are derived from a material comprising perovskite and silica, along with cements and cementitious products comprising the cement additives. The invention also provides methods for the making the cement additive and cements and cementitious products comprising the cement additives.

The invention provides cement additives comprising calcium sulfate and silica which are derived from a material comprising perovskite and silica, along with cements and cementitious products comprising the cement additives. The invention also provides methods for the making the cement additive and cements and cementitious products comprising the cement additives.

The invention relates to a method (100) for selecting the composition of a construction material including an excavated clay soil, said construction material composition to include deflocculating agent and activating agent quantities adapted to the excavated clay soil, said method including a step of receiving (130) a measured value of at least one physicochemical property of an excavated clay soil, and a step of selecting (170) a deflocculating agent quantity and an activating agent quantity adapted to the excavated clay soil. In addition, the invention also relates to a method (200) for calibrating a calculation algorithm for determining the composition of a site construction material, to a construction material formed from an excavated clay soil, and to a system (400) for preparing a construction material including an excavated clay soil.

Provided are a method for preparing a gel composite material with a piezoelectric property, and the gel composite material and use thereof, which belongs to the field of intelligent road traffic. In the method, titanium-containing blast furnace slag and metal oxides (PbO and ZrO.sub.2) are sufficiently and uniformly mixed, an obtained mixture is calcined under a certain thermal system, on the theoretical basis of mineral-phase reconstruction-synergistic regulation of all valuable components, and the mixture is cooled to a room temperature with a furnace to obtain the gel composite material with a piezoelectric property.

A process for the waterproofing of porous construction materials, the process including the steps of mixing water and a composition C, the composition C comprising, in each case based on the total weight of the composition C, a) 2-15 wt.-% of at least one binder selected from natural hydraulic lime (NHL), formulated lime (FL), and hydraulic lime (HL), b) 1-20 wt.-% of at least one pozzolanic material, c) 40-80 wt.-% of at least one aggregate, d) 2-30 wt.-% of at least one synthetic polymer, and wherein the content of Portland cement in said composition C is <3 wt.-%, applying the mixture thus obtained to a porous construction material, and optionally hardening the applied mixture.

A pipe fixing device includes a fixing portion formed in a channel shape in which a first space therein is opened to an outside through an opening formed in an upper portion; and a support coupled to a lower portion of the fixing portion and made of steel-making slag, wherein a part of upper end edges of the fixing portion corresponding to a front and a rear of the opening is formed to be bent toward the first space.

Disclosed herein is a method and an apparatus for producing a shaped article. The method comprises obtaining a freshly produced aluminosilicate-containing particulate waste material and, before the waste material cools to ambient temperature, mixing the waste material into a mixture, wherein the mixture comprises the aluminosilicate, a metal oxide, an alkali, a water soluble silicate and water; shaping the mixture; and curing the shaped mixture, whereby the shaped article is produced.