Abstract: The present invention discloses a low carbon ultra-high performance engineered geopolymer composite and its preparation method and application, which belongs to the technical field of building materials, an activator used therein is a NaOH—Na2SiO3 activator as a basic activator, and Na2CO3 is used as a supplementary activator to form a low carbon composite activator. The preparation method comprises the following steps: (1) after mixing uniformly the cementitious material powder, barium chloride, and defoaming agent, adding successively quartz sand, activator, water reducer, nano calcium carbonate and PE fiber and stirring uniformly to obtain a slurry; (2) pouring and forming the obtained slurry and maintaining, then obtaining the low carbon ultra-high performance engineered geopolymer composite.

Abstract: The present invention discloses a low carbon ultra-high performance engineered geopolymer composite and its preparation method and application, which belongs to the technical field of building materials, an activator used therein is a NaOH—Na2SiO3 activator as a basic activator, and Na2CO3 is used as a supplementary activator to form a low carbon composite activator. The preparation method comprises the following steps: (1) after mixing uniformly the cementitious material powder, barium chloride, and defoaming agent, adding successively quartz sand, activator, water reducer, nano calcium carbonate and PE fiber and stirring uniformly to obtain a slurry; (2) pouring and forming the obtained slurry and maintaining, then obtaining the low carbon ultra-high performance engineered geopolymer composite.

Abstract: The present application provides a display panel and a display device. The display panel includes a frame. The frame includes a light-facing portion and a backlight portion, wherein the backlight portion faces a light-shielding region and is provided as a light to guide the lights emitted from the side light source toward the frame to the light-shielding region. The backlight portion of the frame is provided as a light guide to guide the lights to the light-shielding region to improve the brightness of the light-shielding region on the display screen, so that the overall brightness of the display screen is more uniform and the display effect is improved.

Abstract: The present application provides a display panel and a display device. The display panel includes a frame. The frame includes a light-facing portion and a backlight portion, wherein the backlight portion faces a light-shielding region and is provided as a light to guide the lights emitted from the side light source toward the frame to the light-shielding region. The backlight portion of the frame is provided as a light guide to guide the lights to the light-shielding region to improve the brightness of the light-shielding region on the display screen, so that the overall brightness of the display screen is more uniform and the display effect is improved.

Abstract: A ventilation and noise reduction system for centralized cooling towers includes a wind outlet sound-reduction structure, a wind inlet sound-reduction channel, a rainwater collection system, and an arrestor device; wherein the integrated sound-absorbing and sound-insulation shed includes a loading-bearing installation structure for a lifting ring, a concrete foundation, a bearing support structure, a ceiling installation structure, a sound-insulation structure and a lighting and sound-insulation structure.

Abstract: A ventilation and noise reduction system for centralized cooling towers includes a wind outlet sound-reduction structure, a wind inlet sound-reduction channel, a rainwater collection system, and an arrestor device; wherein the integrated sound-absorbing and sound-insulation shed includes a loading-bearing installation structure for a lifting ring, a concrete foundation, a bearing support structure, a ceiling installation structure, a sound-insulation structure and a lighting and sound-insulation structure.