摘要
采用硫酸盐与酸侵蚀试验、扫描电镜和能谱分析测试,研究了无机聚合物混凝土(IPC)和硅酸盐水泥混凝土(PC)的腐蚀耐久性、微观结构、组成与性能机理。结果表明I:PC较PC具有优异的耐硫酸盐和酸侵蚀性。5%的硫酸钠溶液中侵蚀60d后I,PC外观变化评定为I级,耐蚀系数为0.99,比PC提高了25.3%,质量和抗压强度略有增长,PC强度则降低了20.92%;5%的盐酸溶液中浸泡60d后,IPC外观变化评定为I级,耐蚀系数为0.98,比PC提高了27.3%,质量损失不足PC的1/2,强度损失为PC的5.5%。IPC水化产物主要为低Ca/Si比的C-S-H(I)、碱性铝硅酸盐和沸石型矿物水化物,没有Ca(OH)2晶粒和过渡带,内部裂缝孔隙少,结构密实性和均匀性更好,高达87MPa的强度也提高了界面抑制损伤的能力,因此IPC具有优异的腐蚀耐久性能。
Corrosion resistance,microstructure,composition and performance mechanism of inorganic polymer concrete（IPC）were compared with portland concrete（PC）by sulfate and acid corrosion experiments,SEM and EDS.The results show IPC has better sulfate and acid corrosion resistance.After being exposed to 5%Na2SO4 for 60 d,assessment of surface of IPC is I class,corrosion resistance coeffient is 0.99,25.3%higher than PC,mass and compressive strength increase slightly,strength of IPC is decreased by 20.92%;After being exposed to 5%hydrochloric acid for 60 d,assessment of surface of IPC is I class,corrosion resistance coeffient is 0.98,27.3%higher than PC,mass change is less than 1/2 of PC,strength is decreased as 5.5%of PC.Hydration products of IPC are mostly C-S-H（I） with low Ca/Si,alkaline aluminate-silicate,and zeolite miner-al,it doesn＇t have C（aOH）2 and transition strip,has little inner voids and cracks,better compact degree and uniformity of structure,and high com-pressive strength（87 MPa）also restrains its interface damage,therefore,IPC has excellent corrosion resistance.
出处
《混凝土》
CAS
CSCD
北大核心
2011年第2期36-39,42,共5页
Concrete
基金
军队重点科研项目(ZY070738)
关键词
无机聚合物混凝土
硅酸盐水泥混凝土
耐久性
硫酸盐腐蚀
酸腐蚀
微观结构
组成
inorganic polymer concrete
Portland cement concrete
durability
sulfate corrosion
acid corrosion
microstructure
composition
