CAJ | 학술논문

为了减轻使用波特兰水泥作为软土固化剂存在的高能耗、CO 2排放和不可再生资源消耗等环境问题，通过室内配合比试验初步研究碱激发矿粉对连云港软土的固化效果，并与水泥固化进行对比。结果表明：Na 2 CO 3对矿粉固化土的激发效果非常有限；NaOH激发矿粉的效果最好，7 d，28 d，90 d无侧限抗压强度最高，但是在90 d后会发生一定的强度衰减；矿粉+电石渣固化土的7 d，28 d强度比水泥固化土低，而90 d，180 d强度比水泥固化土高。Na2CO3，NaOH和Na2SO4能够加速矿粉+电石渣固化土的强度增长速率，其中，Na2CO3的效果最弱，虽然可以在90 d内提高矿粉+电石渣固化土的强度，但180 d强度反而略低；NaOH激发的矿粉+电石渣固化土强度在7 d，28 d，90 d龄期均有较大的提高，但从90 d到180 d会发生强度衰减；Na 2 SO 4激发矿粉+电石渣的效果最好，可以在实际工程中进行应用，不仅可以减小水泥生产过程带来的环境影响，还能提高软土固化效果，降低工程造价。
위료감경사용파특란수니작위연토고화제존재적고능모、CO 2배방화불가재생자원소모등배경문제，통과실내배합비시험초보연구감격발광분대련운항연토적고화효과，병여수니고화진행대비。결과표명：Na 2 CO 3대광분고화토적격발효과비상유한；NaOH격발광분적효과최호，7 d，28 d，90 d무측한항압강도최고，단시재90 d후회발생일정적강도쇠감；광분+전석사고화토적7 d，28 d강도비수니고화토저，이90 d，180 d강도비수니고화토고。Na2CO3，NaOH화Na2SO4능구가속광분+전석사고화토적강도증장속솔，기중，Na2CO3적효과최약，수연가이재90 d내제고광분+전석사고화토적강도，단180 d강도반이략저；NaOH격발적광분+전석사고화토강도재7 d，28 d，90 d령기균유교대적제고，단종90 d도180 d회발생강도쇠감；Na 2 SO 4격발광분+전석사적효과최호，가이재실제공정중진행응용，불부가이감소수니생산과정대래적배경영향，환능제고연토고화효과，강저공정조개。
In order to mitigate the environmental impacts in terms of high energy consumption,CO 2 emissions and no-renewable resources consumption associated with Portland cement(PC) soft soil stabilization , the stabilization effect of alkali-activated ground granulated blast-furnace slag(GGBS) for Lianyugang soft soil was investigated through laboratory test and then it was compared with that of PC. The results show that the Na2CO3-activated GGBS had the minimum stabilization efficacy for this soft soil. NaOH-activated GGBS stabilized soil had the highest unconfined compressive strength(UCS) at 7,28 and 90 days,however its UCS decreased after 90 days. The GGBS-carbide slag stabilized soil had lower 7-day and 28-day UCS than that of PC mix,whilst the former had much higher 90-day and 180-day UCS than the latter. The Na 2 CO 3 ,NaOH and Na 2 SO 4 could accelerate the strength development rate of GGBS-carbide slag stabilized soil. The Na2CO3-activated GGBS-carbide slag stabilized soil had only slightly higher 7-day,28-day,90-day UCS and lower 180-day UCS than those without Na2CO3. NaOH significantly increased the UCS of GGBS-carbide slag stabilized soil at 7,28 and 90 days. However the UCS decrease was observed from 90 days to 180 days. The Na 2 SO 4 had the highest activating efficacy for GGBS-carbide slag stabilized soil,and thus was suggested to use in practice due to both the economical and environmental benefits.