A method of preparing high strength coral concrete, wherein the high strength coral concrete is prepared from raw materials of the following parts by mass: 25˜63 parts of cementing materials, 45˜58 parts of coral aggregate, 10˜16 parts of mixing water and water reducer 2˜5% the weight of the cementing materials; the weighed coral aggregate, mixing water, water reducer and 55˜85% of the cementing materials are stirred in an agitator for 10˜15 minutes; the rest of cementing materials are added in batches before initial setting and stirred; then poured and removed from the mould after 24 hours, cured in mixing water at normal temperature for 28 days, to get the high strength coral concrete.

An admixture for making a high-strength concrete with any type of water, including potable water, freshwater, saltwater, brackish water, reclaimed water or any other non-potable water. The admixture consists of basalt fibers, graphene nanoplatelets, calcium sulfide, calcium chloride, magnesium oxide and nanoclays. The admixture can be added to the cement to supplement it to increase the overall compressive strength, or the amount of cement used can be reduced by the amount of admixture added to shorten cure times. A concrete mix can also be prepared by replacing the calcium chloride with silica fume, reducing the amount of cement used, and introducing locally sourced aggregates, coarse and fine, to yield Ultra High Performance Concrete. Products made from the concrete incorporating the admixture have increased compression strength, improved cure times, reduced water consumption and corrosion, increased durability and workability, drastically reduced freeze-thaw effects, and superior crack control.

The present invention belongs to the field of composite materials, and particularly to a non-flowable quick-setting phosphate cement repair material with strong cohesive forces and the preparation method thereof. The material comprises the following raw materials in percentage by weight: 20% to 40% of sand, 5% to 12% of ammonium dihydrogen phosphate, 10% to 25% of magnesium oxide, 2% to 8% of fly ash, 30% to 60% of rubber powder, 6% to 10% of silica fume, 0.35% to 0.6% of a polycarboxylate high efficiency water-reducing agent, 1% to 5% of sodium silicate, 1.5% to 2% of a polypropylene fiber, 0.5% to 2% of a retarder, and 8% to 10% of water. The material is used as the repair material for the special positions of bottom boards of bridges or facades of buildings which are damaged, and the repair effect thereof is remarkable.

A multifunctional cement additive includes a biochelant and a solvent. The biochelant includes a sodium glucarate liquid oxidation product including predominantly gluconate and glucarate anions with minor component species of n-keto-acids and C.sub.2-C.sub.5 diacids. A cement composition includes (i) a cementitious material and (ii) a biochelant, and (iii) a solvent. The biochelant includes a sodium glucarate liquid oxidation product including predominantly gluconate and glucarate anions with minor component species of n-keto-acids and C.sub.2-C.sub.5 diacids.

Provided are a structural energy-saving, heat-insulated and decorative integrated plate and a manufacturing method therefor. The method includes: step 1: welding outer side keels, an inner side keel and a bottom keel into a wall framework; step 2: fixing an inner side decorative plate and an outer side decorative plate on the wall framework through shoot nails, and a hollow structure formed by the inner side decorative plate, the outer side decorative plate and the wall framework being a filling and pouring layer; and step 3: grouting the filling and pouring layer, to form a wall filled with cement foamed polystyrene particles. The present invention features a rational structure, manufactures an integrated wall plate with decorated inner and outer sides, and can replace patterns on the decorative plates. The integrated plate features energy saving, environmental friendliness, shock resistance, compression resistance, fire prevention, heat insulation and sound insulation.

This disclosure provides electron beam irradiated products and methods thereof. In particular, the invention is directed to a products and methods that comprise an electron beam irradiated component and a second component. The electron beam irradiated component may be plastic. The second component may be a building material or construction material. The invention is also directed to methods of manufacturing a modified polymer material with an electron-beam. Methods comprise irradiating the polymer particles of the material by dosing with electron beam radiation to produce a modified polymer material comprising irradiated polymer particles.

The present invention provides a fiber-reinforced cement composition comprising; cement, fiber, silica, filler, expanded perlite, and polymer. The fiber-reinforced cement composition according to the present invention has low density, high toughness and flexural strength, and not contains volatile composition. When it is molded into workpiece, the workpiece is lightweight, easy to be cut and/or lathed into desired shapes, drilled and fixed with screws and/or repeatedly nailed at the same position, tolerant to humidity, termites and insects, inflammable and does not produce powder when cut, drilled and/or lathed that is hazardous to the workers. Therefore, it is suitably applicable for being utilized as a material for manufacturing furniture parts.

Methods, compositions, and apparatuses are provided herein that utilize polystyrene from recycled products to make a high strength composite concrete that can be used for subgrade utility vaults, utility trenches, etc. Polystyrene is a widely-used plastic that can be collected and then densified at particular parameters including temperature to transform the polystyrene to a usable form. Then, the densified polystyrene is combined with other resin materials and dry materials to form a high-strength concrete material. The amount of densified polystyrene that is combined with the other materials is critical to control shrinkage and expansion of the concrete material during manufacturing.

A concrete composition that includes (i) a treated palm oil fuel ash, wherein the treated palm oil fuel ash is the only binder present, (ii) a fine aggregate, (iii) a coarse aggregate, and (iv) an alkali activator containing an aqueous solution of sodium hydroxide and sodium silicate. A cured concrete made from the concrete composition is also disclosed with advantageous compressive strength properties.

A hydratable cement composition which will bond to both asphalt and cementitious substrates is supplied for the repair of various surfaces. The composition comprises of a combination of Portland cement, calcium sulfoaluminate cement or calcium aluminosilicate, and an alkali metal salt activated pozzolonic powder, wherein the Portland cement content of the hydratable portion of the composition is greater than 20%. The composition is free from latex bonding agents and calcium aluminate. The composition is mixed with water to form a typical cement, mortar, or concrete consistency, placed and allowed to cure. The result is a self-adhering patch to damaged surfaces. The hydratable cement composition may also be used to fabricate items of original construction by casting into molds or forms.