The present invention discloses a micro-nano composite hollow structured nanometer material-modified high-durability concrete material, and according to mass parts, its raw material formula is as follows: cobaltosic oxide, 1000-1500 parts; cement, 1000-1300 parts; dioctyl sebacate, 1000-1500 parts; water, 800-1200 parts; nanocarbon, 1200-1800 parts; nano calcium carbonate, 35-50 parts; sodium silicate, 10-20 parts; micro-nano structured calcium molybdate, 50-80 parts; dipentaerythritol, 60-90 parts; and dioctyl ester 30-60 parts. The present invention enables existing concrete to be improved effectively and stably in terms of shrinkage, cracking resistance and rapid hardening; the synthetic chemical functional material may lower a chloride ion diffusion coefficient of the concrete by more than 50%, cut down shrinkage by more than 30%, and reduce the cracking risk of concrete products by 50%.

The present invention discloses a micro-nano composite hollow structured nanometer material-modified high-durability concrete material, and according to mass parts, its raw material formula is as follows: cobaltosic oxide, 1000-1500 parts; cement, 1000-1300 parts; dioctyl sebacate, 1000-1500 parts; water, 800-1200 parts; nanocarbon, 1200-1800 parts; nano calcium carbonate, 35-50 parts; sodium silicate, 10-20 parts; micro-nano structured calcium molybdate, 50-80 parts; dipentaerythritol, 60-90 parts; and dioctyl ester 30-60 parts. The present invention enables existing concrete to be improved effectively and stably in terms of shrinkage, cracking resistance and rapid hardening; the synthetic chemical functional material may lower a chloride ion diffusion coefficient of the concrete by more than 50%, cut down shrinkage by more than 30%, and reduce the cracking risk of concrete products by 50%.

The present invention discloses a micro-nano composite hollow structured nanometer material-modified high-durability concrete material, and according to mass parts, its raw material formula is as follows: cobaltosic oxide, 1000-1500 parts; cement, 1000-1300 parts; dioctyl sebacate, 1000-1500 parts; water, 800-1200 parts; nanocarbon, 1200-1800 parts; nano calcium carbonate, 35-50 parts; sodium silicate, 10-20 parts; micro-nano structured calcium molybdate, 50-80 parts; dipentaerythritol, 60-90 parts; and dioctyl ester 30-60 parts. The present invention enables existing concrete to be improved effectively and stably in terms of shrinkage, cracking resistance and rapid hardening; the synthetic chemical functional material may lower a chloride ion diffusion coefficient of the concrete by more than 50%, cut down shrinkage by more than 30%, and reduce the cracking risk of concrete products by 50%.

The present invention discloses a micro-nano composite hollow structured nanometer material-modified high-durability concrete material, and according to mass parts, its raw material formula is as follows: cobaltosic oxide, 1000-1500 parts; cement, 1000-1300 parts; dioctyl sebacate, 1000-1500 parts; water, 800-1200 parts; nanocarbon, 1200-1800 parts; nano calcium carbonate, 35-50 parts; sodium silicate, 10-20 parts; micro-nano structured calcium molybdate, 50-80 parts; dipentaerythritol, 60-90 parts; and dioctyl ester 30-60 parts. The present invention enables existing concrete to be improved effectively and stably in terms of shrinkage, cracking resistance and rapid hardening; the synthetic chemical functional material may lower a chloride ion diffusion coefficient of the concrete by more than 50%, cut down shrinkage by more than 30%, and reduce the cracking risk of concrete products by 50%.

A honeycomb catalyst support structure including a honeycomb body and an outer layer or skin formed of a cement is described. The cement includes an amorphous glass powder with a multimodal particle size distribution applied to an exterior surface of the honeycomb body. The multimodal particle size distribution is achieved through the use of a first glass powder having a first median particle size and at least a second glass powder having a second median particle size. In some embodiments, the first and second glass powders are the same amorphous glass consisting of fused silica. The cement may further include a fine-grained, sub-micron sized silica in the form of colloidal silica. The cement exhibits a coefficient of thermal expansion less than 1510.sup.7/ C., and preferably about 510.sup.7/ C. after drying.