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With the rapid development of economy, the scale of construction industry is gradually expanding, and the construction performance and comprehensive performance of each construction project are developing faster and faster. Compared with the traditional superplasticizer, nano-sized polycarboxylic acid superplasticizer has the advantages of high water reducing rate, small collapse loss and good cement adaptability. China's polycarboxylic acid high performance water reducer is mainly used in high-speed railway, highway, bridge and other key projects, the market share of commercial concrete is relatively low. In this paper, the research of nano-sized large monomer polycarboxylic acid high performance water reducer in high performance concrete under microscope is studied. The effect of nano-sized large monomer polycarboxylic acid high performance water reducer on durability and compressive strength of high performance concrete is studied. [ABSTRACT FROM AUTHOR]

China is a big oil country, and its oil production and storage are in the forefront of the world. However, China's oil resources are mainly low-permeability reservoirs. It is characterized by small porosity, which leads to the increase of injection pressure and seriously affects the production rate. The main solution is to use polysilicon nano injection enhancer. Polysilicon nano materials can solve the problem of high injection pressure from the micro level. At present, there are many researches on polysilicon nano injection technology at home and abroad, but the research on the application of polysilicon nano materials in natural gas pipeline materials is still blank. In order to solve this problem, this paper will further study the injection enhancement effect of polysilicon nano materials in natural gas pipeline materials. First of all, through theoretical research and analysis, this paper believes that polysilicon nano injection technology has good application, good effect in oilfield injection pressure drop, and obvious advantages over other traditional injection additives. In order to further analyze the injection enhancement effect of polysilicon nanomaterials, the corresponding experimental model is established. The experiment is divided into two parts, one is the preparation of reagents and solvents. In this paper, nano polysilicon solution and corrosion inhibitor are re optimized. The other part is the specific test steps. In order to ensure the quality and verifiability of the test, this paper explains and records the test principle and steps in detail. After sampling and analysis of many core factors such as adsorption time and permeability, it can be seen from the analysis data that when polysilicon nanomaterials are injected, when the injection volume is about 1pv, the effect of depressurization is the best, and the comprehensive effect of depressurization is good. This study has achieved ideal results, which is of great significance to the related research of oil field. [ABSTRACT FROM AUTHOR]

Natural gas is an important energy in China's production and life. In the environment of advocating low-carbon life, natural gas is an important part of low-carbon energy. But what does not match with the demand is that the development technology of natural gas in China is relatively backward, and the most prominent one is the gas leakage phenomenon of natural gas pipeline. The aging and corrosion of natural gas pipelines often lead to more serious safety problems. At present, the main solution is to coat the natural gas pipeline with anti-corrosion materials, but the effect is not satisfactory because of the uneven quality of the materials. In order to solve this problem, the preparation method of nanocomposite inner coating and its application in natural gas pipeline are studied in this paper. Firstly, this paper focuses on the application of nano materials and nano composite materials in the field of anti-corrosion coating, and analyzes the physical benefits of materials. It is considered that the protective mechanism of the nanocomposite anticorrosive coating is mainly through the adhesion of the coating to the metal substrate, the mechanical isolation of the corrosive medium, the formation of passive protective film and electrochemical protection on the metal surface. In order to further analyze the specific effect of nanocomposite coating, the corresponding experimental model is established in this paper. Many comparative experiments including tensile property analysis, particle size analysis, hydrophobic property and DSC were carried out. It can be seen from the experimental data that the nano composite anti-corrosion coating performs well in the experimental test and has good corrosion resistance, but both the tensile property and hydrophobicity are related to the degree of hard segment. According to the comprehensive analysis, the nanocomposite inner coating is suitable for the weather pipeline, which is recommended to be popularized. [ABSTRACT FROM AUTHOR]

Nowadays, China's urbanized buildings are prominent, and the building area continues to grow. The study of keeping the temperature of the building walls constant has become an indispensable key standard for building energy conservation. The purpose of this paper is to simulate and study the thermal energy performance of nanomaterial modified fly ash lightweight energy-saving model in prefabricated buildings. In this paper, in the selection of nanomaterial modified fly ash technology, the finite element simulation technology is adopted to study the thermal insulation effect of nanomaterial modified fly ash in building materials, and it also plays a guiding role in the actual work. In the experiment of improving fly ash lightweight and energy-saving wallboard with nanomaterials, we set up two groups of controlled experiments, namely modifying fly ash with traditional materials and modifying fly ash with nanomaterials. By comparing the heat preservation and heat insulation performance of modified energy-saving wall panels in prefabricated buildings. The results show that the nano-material modified fly ash foamed concrete, as 140 mm thick fabricated wall panel, has a good inhibitory effect on temperature transfer in the simulation of heat transfer. Under the condition of air-conditioning heating in winter and cooling in summer, the temperature difference between the inner surface temperature of the wall envelope (16.32 °C in winter and 23.25 °C in summer) and the indoor temperature (15 °C in winter and 23 °C in summer) is less than 3 °C. Therefore, the flyash lightweight energy-saving wallboard modified by nanomaterials can play a role in heat insulation and show good heat insulation characteristics in prefabricated buildings. [ABSTRACT FROM AUTHOR]

Due to the rapid development of China and the increasing demand for various minerals, the accidents of mine operations have occurred frequently in recent years, which have caused a huge obstacle to the safety of the people's lives and the prosperity and prosperity of the country. Not to be ignored, the response is also imminent. Based on the above background, this paper aims to study the safety of nano-material powder control technology on mine gas explosion suppression. In order to further analyze the influence of nanomaterials on explosion suppression and the improvement of safety performance, the flame propagation and pressure characteristic parameters of gas explosion were selected to evaluate the safety performance. In this paper, nano-calcium carbonate and nano-silica are selected for explosion suppression experiments. According to the gas explosion theory, the smaller the particle size of the powder, the better the explosion suppression effect. Silicon oxide's small size effect, interface effect, photoelectric characteristics, etc., enhance the powder's anti-explosion performance. In the experiment, by adding powder, it was verified that the safety of nano-powder control technology for gas explosion suppression was improved. This article combines powder control technology with nano-materials, making full use of the powder properties of nano-materials, and studying their improvement of the safety performance of gas explosion suppression. [ABSTRACT FROM AUTHOR]

With the rapid development of industry and transportation in China, the incidence rate of open fracture caused by high energy injuries such as traffic accidents and falling height is increasing year by year. Based on the above background, the purpose of this paper is to study the application of ZnO nano materials with different dimensions in the rehabilitation of patients with limb fracture injury. In order to further solve the problem of limb fracture rehabilitation, zinc oxide nanomaterials are applied to fracture rehabilitation in this paper. The application of zinc oxide nanomaterials in fracture rehabilitation is realized by its strong antibacterial, high-efficiency stability and rich and colorful structure. In this paper, we propose to use the unique physical and chemical properties of ZnO nanomaterials to prepare artificial bone, bone cement, external fixation with good osteogenic performance and antibacterial performance, and carry antibiotics for the treatment of open fracture infection and bone defect. During the experiment, compared with other materials, the infection rate of external fixation was only 63%, and the inflammation index of artificial bone was only 2 mg/dl, which was far less than other materials. Moreover, using the excellent plasticity of ZnO nanomaterials, the oriented ZnO nanotube films were prepared, and the effect of inhibiting scar formation was confirmed through experimental research. In this paper, the unique physical, chemical and biological characteristics of zinc oxide nanomaterials were used to creatively introduce them into the treatment of infectious bone defect and injury rehabilitation caused by limb fracture. Through a series of in vitro and animal in vivo experiments, it was proved that zinc oxide nanomaterials can be used as ideal materials for the treatment of infectious bone defect, which provides new zinc oxide nanomaterials to solve clinical problems A new way of thinking. [ABSTRACT FROM AUTHOR]