Exploring the deformation mechanism of cement slurry is of great theoretical significance to ensure the safety and stability of construction, highways, railways, hydropower, nuclear waste disposal and other engineering components, which can provide a theoretical basis for disaster prevention and environmental protection. Scientists have established many theories and models, which are partially reasonable and clearly insufficient because they cannot explain the various deformations, microstructure evolution, strength formation and development of cement slurry solidification. A new hypothesis of the cement slurry deformation mechanism is proposed. The hypothesis is that the combination of clinker and its hydration products expands, shrinks, and re-expands in sequence, and the stress between them changes from repulsion to attraction and then to the coexistence of repulsion and attraction, inducing micro-and macro deformation of the cement slurry. The water cement ratio and mean size are the main factors affecting the deformation. This hypothesis can reasonably explain the deformation of cement slurry. The formation and development of the cement slurry strength are discussed. Some viewpoints are questioned, and some suggestions are given.
As environmental pollution has become more and more serious, in order to alleviate environmental and energy problems, people have begun to find new ways of governance in environmental management. Many countries have proposed to incorporate environmental performance into corporate performance for assessment. Under the historical background that the construction of ecological civilization has risen to a national strategy, the research on corporate environmental performance has attracted more and more attention. This paper constructs an environmental performance evaluation index system, evaluates the environmental performance of the enterprise, finds out the problems in the environmental performance of the enterprise, and proposes improvement suggestions. This is conducive to the change of the environmental policy of the enterprise, the improvement of the environmental performance level of the enterprise, and the protection of the ecological environment. This article introduces the mobile communication network, constructs the LMS model of the satellite mobile communication system, and analyzes the structure and main functions of the model. The article explains the role of corporate environmental governance, builds an environmental performance indicator system, selects several companies to evaluate the environmental governance performance of the past two years, and obtains the comprehensive performance index, stress index, state improvement index, and response index of the four companies in 2020. The four indexes of company A are 1.28, 1.3, 12, and 1.45, and the four indexes of company B are 2.96, 3.1, 8, and 2.9.
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