On April 28, 2018, the "11th World Milling Summit 2018" hosted by China Cement Network and co-organized by Angell Foundation Evergreen Ranking was held in Nanjing. Gu Yanqing, the president of Jiangsu Concrete Association, attended the summit and gave a speech entitled "Advancing Cement and Concrete Quality Promotion Project to Create Energy Saving and Emission Reduction".
The theme of this year's World Milling Summit is “Optimization of the grinding system to promote energy saving and consumption reduction”. Through the interpretation of relevant national policies and policies, communicate the new skills, new processes and new equipment of the global cement industry grinding system to accelerate energy saving and consumption reduction. The transformation and advancement of the core grinding system skills are practical and far-reaching. Gu Yanqing indicated that the primary object of cement supply is concrete. Therefore, the technical transformation and advancement of the cement industry, the change in the specifications of cement products and the advancement of quality have a great impact on the production of concrete, and in the end they are all reflected in the quality of construction.
I. The largest energy saving and emission reduction in the scope of the project is the quality of construction and the life of the building.
Saving resources and protecting the environment are the basic national policies that our country must adhere to for a long time. Today, we are facing increasing domestic and international constraints on resources and the environment. There is an increasing need to increase awareness of crisis, urgency and responsibilities.
Creating a resource-saving and environment-friendly society is an important focus of China's accelerated change in economic development methods. After more than 30 years of continuous economic and social development through reform and opening up, today, we need to accelerate the change of economic development methods to complete the sound and rapid development of China's economic and social development. At that time, we should focus on energy conservation and emission reduction, actively promote low-carbon skills, vigorously promote green production, and accelerate the development of a circular economy. The concrete occupation is to change from large resource-consuming households to large environmental pollution households, especially to modern production methods that are energy-saving and emission-reducing and green and low-carbon.
Project creation is the largest material production activity, which consumes a lot of resources and generates a lot of CO2. Therefore, it must become the main point of energy conservation and emission reduction.
China is the country with the largest number of projects and the most resources consumed each year in the world. According to the investigation and analysis of the Ministry of Housing and Urban-Rural Development, China has become the country with the largest amount of new construction each year in the world, consuming 50% of the world's cement and steel every year. According to statistics from the National Bureau of Statistics, China ’s total fixed capital investment in 2011 reached 31.1 trillion yuan, during which the construction area of houses alone reached 8.462 billion square meters. From this, it is estimated that the resources and CO2 emitted by our country every year due to the construction of the project are extremely huge.
China is the country with the largest amount of construction waste in the world. With the construction of large-scale projects in China, a lot of construction waste also occurs every year. According to the data provided by the Concrete Branch of the China Construction Industry Association, the construction waste discharged per 10,000 square meters of construction in China is about 500-600 tons, and the construction waste generated by the old construction removed per 10,000 square meters is about 7,000-12,000 tons. Approximately 1 billion tons of construction waste has occurred each year in practice, and 45% of it was abandoned concrete.
China is a country with a short life span of constructions in the world. The average life span of buildings in China today is relatively low, and it is far from the level of developed countries. The leaders of the Ministry of Housing and Urban-Rural Development said a while ago that the average life span of buildings in China today is lacking for 30 years. According to the analysis of relevant data, the average service life of British buildings is 132 years, that of France is 102 years, that of the United States is 74 years, and that even Japan, which has frequent earthquakes, has reached 60 years. China consumes about half of the world's related resources every year, 1 billion tons of construction waste occurs, and various constructions of tens of billion square meters have been created. However, the service life of the constructions is so short. amazing. Nanjing is demolition of a series of 4 viaducts on the west trunk road of the city this month. The service life of these 4 viaducts is only 16 years, and the concrete and steel waste caused by the explosion removal has reached more than 30,000 cubic meters. When people lament the advancement of explosive skills, they even lament the short life span of these viaducts. In our country, the average service life of today's constructions is short. There are many reasons for this. There are backward planning, unscientific planning, poor and irrational planning, mistakes in decision planning, bureaucratic perseverance, and the quality of construction and materials. Problems, including concrete strength and durability, must be analyzed one by one and practically solved.
The biggest energy-saving and emission-reduction scope created by the project is to advance the quality of construction and extend the service life of buildings. The energy conservation and emission reduction in the scope of China's engineering creation, and the energy conservation and emission reduction in a series of areas associated with it, have far-reaching burdens and burned eyebrows. Advancement in construction quality and extension of the service life of constructions should be the primary task of energy conservation and emission reduction in the scope of project creation, and should be the highest responsibility of each founder.