论文部分内容阅读
1前言普通混凝土抗拉强度低，极限拉伸值S。为l～2ｘ104。当收缩值大于此值时，混凝土就会开裂，常导致混凝土工程渗漏，降低了其使用功能和耐久性。在混凝土中掺入适量膨胀剂，以消除或减少混凝土的收缩裂缝，是最有效的抗裂途径，因而研制价格低廉、性能优良的膨胀剂有重要意
1 Introduction Normal concrete has low tensile strength and ultimate tensile strength S. l ~ 2x104. When the shrinkage value is greater than this value, the concrete cracks, often leading to leakage of the concrete works, reducing its use function and durability. Mixing appropriate amount of expansion agent in concrete to eliminate or reduce shrinkage cracks of concrete is the most effective anti-cracking method. Therefore, it is important to develop a low-cost, high-performance expanding agent.