科技通报
科技通報
과기통보
BULLETIN OF SCIENCE AND TECHNOLOGY
2015年
5期
132-136,141
,共6页
金裕民%郑旭卫%蔡纯阳%王国才%沙玲
金裕民%鄭旭衛%蔡純暘%王國纔%沙玲
금유민%정욱위%채순양%왕국재%사령
滩涂淤泥%固化%强度%试验
灘塗淤泥%固化%彊度%試驗
탄도어니%고화%강도%시험
beach silt%stabilization%strength%test
为进一步揭示滩涂淤泥固化土的强度特性及其影响因素，对以沿海滩涂淤泥为原料土、水泥-粉煤灰作为主固化剂配置固化而成的滩涂淤泥固化土的强度特性与固化机理进行了试验研究。通过无侧限抗压强度试验，详细探讨了水泥、粉煤灰、减水剂、石灰、石膏、三乙醇胺、硫酸钠、氯化钠等主固化剂和外掺剂对滩涂淤泥固化土强度特性的影响，分析了固化剂和外掺剂对提高固化土强度的机理。结果表明：龄期以及水泥、减水剂、石灰、石膏、粉煤灰、三乙醇胺、硫酸钠和氯化钠等的掺量均对固化土的强度有影响。水泥和粉煤灰掺量越多，固化土的强度越高，而外掺剂，如减水剂、石灰、石膏、三乙醇胺、硫酸钠和氯化钠的掺量存在临界值。在临界值内，固化土的强度随外掺剂的掺量的增加而增加，超过该值后，则随外掺剂掺量的增加而减小。龄期对固化土的强度有较大影响，7d龄期下的固化土的强度要远小于28 d时的强度。
為進一步揭示灘塗淤泥固化土的彊度特性及其影響因素，對以沿海灘塗淤泥為原料土、水泥-粉煤灰作為主固化劑配置固化而成的灘塗淤泥固化土的彊度特性與固化機理進行瞭試驗研究。通過無側限抗壓彊度試驗，詳細探討瞭水泥、粉煤灰、減水劑、石灰、石膏、三乙醇胺、硫痠鈉、氯化鈉等主固化劑和外摻劑對灘塗淤泥固化土彊度特性的影響，分析瞭固化劑和外摻劑對提高固化土彊度的機理。結果錶明：齡期以及水泥、減水劑、石灰、石膏、粉煤灰、三乙醇胺、硫痠鈉和氯化鈉等的摻量均對固化土的彊度有影響。水泥和粉煤灰摻量越多，固化土的彊度越高，而外摻劑，如減水劑、石灰、石膏、三乙醇胺、硫痠鈉和氯化鈉的摻量存在臨界值。在臨界值內，固化土的彊度隨外摻劑的摻量的增加而增加，超過該值後，則隨外摻劑摻量的增加而減小。齡期對固化土的彊度有較大影響，7d齡期下的固化土的彊度要遠小于28 d時的彊度。
위진일보게시탄도어니고화토적강도특성급기영향인소，대이연해탄도어니위원료토、수니-분매회작위주고화제배치고화이성적탄도어니고화토적강도특성여고화궤리진행료시험연구。통과무측한항압강도시험，상세탐토료수니、분매회、감수제、석회、석고、삼을순알、류산납、록화납등주고화제화외참제대탄도어니고화토강도특성적영향，분석료고화제화외참제대제고고화토강도적궤리。결과표명：령기이급수니、감수제、석회、석고、분매회、삼을순알、류산납화록화납등적참량균대고화토적강도유영향。수니화분매회참량월다，고화토적강도월고，이외참제，여감수제、석회、석고、삼을순알、류산납화록화납적참량존재림계치。재림계치내，고화토적강도수외참제적참량적증가이증가，초과해치후，칙수외참제참량적증가이감소。령기대고화토적강도유교대영향，7d령기하적고화토적강도요원소우28 d시적강도。
In order to further reveal the strength property and its influence factors of the beach silt stabilized soil, the strength properties and the stabilization mechanism of the beach silt stabilized soil is studies experimentally, of which the stabilized soil is solidified using the coastal beach silt as raw soil and cement-fly ash as main curing agent. By means of unconfined compressive strength test, the influence of main curing agent and additives, such as cement, fly ash, water-reducing agent, lime, gypsum, triethanolamine, sodium sulfate and sodium chloride, etc., on the strength of beach silt stabilized soil, is discussed in great detail. The mechanism of main curing agent and additives on the improvement of stabilized soil strength is analyzed. The results show that: the curing period and the content of cement, water-reducing agent, lime, gypsum, fly ash, triethanolamine, sodium sulfate and sodium chloride, etc., all have influence on the strength of solidified soil. The more content of cement and fly ash is, the higher the strength of the stabilized soil is. But the content of additives, such as water-reducing agent, lime, gypsum, triethanolamine, sodium sulfate and sodium chloride, has a critical value.The strength of the stabilized soil increases with the increase of additive content within the critical value. If the content of the additives passes the critical value, the strength of the stabilized soil will decrease with the increase of additive content. The curing age has much effect on the strength of stabilizes soil. The strength of stabilized soil for 7 days is far less than that for 28 days.
