STRENGTH AND DURABILITY PERFORMANCE OF MARGINAL SOIL STABILIZED WITH ALKALI ACTIVATED WASTE GLASS POWDER UNDER NORMAL AND CO2 CURING. Masters thesis, King Fahd University of Petroleum and Minerals.

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Arabic Abstract

تاينقت ريوطت يعدتست ةجودزم تايدحت ةيدوعسلا ةيبرعلا ةكلمملا يف ةيدلبلا ةبلصلا تايافنلا تايمك دايدزاو ةيّدحلا ةبرتلا لكشت فو . ٍلاع ءادأ تاذو ةمادتسم ةبرت نيسحت طَّشنُملا تايافنلا جاجزلا قوحسم مادختسا ةيناكمإ يف ةساردلا هذه ثحبت ،قايسلا اذه ي ( ً ايولق WGP ) - ةيدلبلا تايافنلا تاقفدت نم اكيليسلاب ينغ يوناث جتنم وهو - ةبرتل ةينوبركلا تاثاعبنلاا ةضفخنم تيبثت ةدامك تيانوتنبلا جزم للاخ نم ً ايربخم اهريضحت مت ةنودللا ةيلاع مييقت ىرج دقو .ةيلحملا ةيخافتنلاا تانيطلا كولس ةاكاحمل لراملاو تارابتخاو ،يوينبلا يرهجملا ليلحتلاو ،ةناتملا مييقتو ،ةمواقملا تارابتخا نمضت لماش يبيرجت جمانرب ربع ةجلاعُملا ةبرتلا صحملا ريغ طغضلا ةوق يف ً اريبك ً انسحت جئاتنلا ترهظأ .ةيؤبنتلا ةجذمنلاو ،حشرلا ( رو UCS طغضلا ةمواقم تعفترا ثيح ؛) ةدمل 28 وحن نم ً اموي 70 نم رثكأ ىلإ ةجلاعملا ريغ ةبرتلل لاكسابوليك 2 نم ةطسوتم بسن دنع لاكساباغيم WGP عم ، ةناتملا تارابتخا تنّيب امك .ةجلاعُملا ةدم ةدايزب ةمواقملا يف روطتلا رارمتسا- تلاو ،فيفجتلاو بيطرتلا تارود كلذ يف امب ضرع ضامحلأل ضرعتلاو ،تاتيربكلل - وحن ىلع ةيوتحملا تاطلخلا نأ %30 نم WGP ظافتحاو ةلتكلا تابث نيب لضفأ ً انزاوت ققحت لوكوتورب قفو حشرلا رابتخا دكأو .ةمواقملا TCLP دودحلا نم ريثكب لقأ تناك يئيبلا ميظنتلل ةعضاخلا رصانعلا عيمج نأ ةملاسلا ىلع لدي امم ،اهب حومسملا رابتخا مت امك .يولقلا طيشنتلا نع جتانلا مويدوصلا زيكرت عافترا مغر ةتبثُملا ةبرتلل ةيئيبلا ( نوبركلا ديسكأ يناثب طغضلا ةضفخنم ةجلاعملا 1-1.5 ةجلاعملا ةيدودحم زربي امم ،يوينب رارقتسا مدع ىلإ تدأ اهنأ لاإ ،)راب بارتلا ماظنلا اذه يف ةنبركلاب-نلا ترهظأو .مزلملا ينيجلا ريبعتلا ةجمربو ددعتملا يطخلا رادحنلاا ىلع ةينبملا ةيؤبنتلا جذام ( GEP يئايميكلا بيكرتلا نيب تاقلاعلا فيصوت ىلع ةديج ةردق )- جئاتنلا دكؤتو .ةمواقملا روطتو ةطلخلا صئاصخو يبيبحلا و ةمادتسم تيبثت ةدام لثمي ً ايولق طَّشنُملا تايافنلا جاجزلا قوحسم نأ ماع لكشب سوملم تانيسحت رفوي ذإ ،ةيّدحلا برتلل ةدعاو ة ةكلمملا ةيؤرل ةيومنتلاو ةيئيبلا فادهلأا معديو ،تايافنلا ةرادإ تايدحت ةجلاعم يف مهسيو ،يسدنهلا ءادلأا يف 2030

English Abstract

The dual challenges of marginal soils and increasing municipal solid waste generation in Saudi Arabia highlight the need for sustainable and high-performance ground improvement strategies. In response, this study investigates alkali-activated waste glass powder (WGP), a silica-rich by-product of municipal waste streams, as a low-carbon stabilizer for a laboratory-engineered high-plasticity soil produced by blending bentonite and marl to replicate the behavior of local expansive clays. The stabilized soil was evaluated through a comprehensive program involving strength testing, durability assessment, microstructural characterization, leaching analysis, and predictive modelling. The results demonstrated a substantial enhancement in unconfined compressive strength (UCS), with 28-day strengths increasing from approximately 70 kPa in the untreated soil to more than 2 MPa at moderate WGP contents and continuing to develop with curing age. Durability evaluations under wetting-drying, sulfate, and acid exposure showed that mixes incorporating around 30% WGP exhibited the most favorable balance of mass stability and strength retention. TCLP leaching confirmed that all regulated elements remained well below environmental limits, indicating the environmental safety of the stabilized system despite elevated sodium release intrinsic to alkali activation. Low-pressure CO2 curing (1-1.5 bar) was also explored but resulted in structural instability, underscoring the limitations of carbonation curing for this material. Predictive models developed using Multiple Linear Regression and Gene Expression Programming captured key relationships between composition, index properties, and strength development. Overall, the findings establish alkali-activated WGP as a promising sustainable stabilizer for marginal soils, offering improved engineering performance while addressing waste-management and environmental objectives aligned with Saudi Arabia’s Vision 2030. TCLP leaching confirmed that all regulated elements remained well below environmental limits, indicating the environmental safety of the stabilized system despite elevated sodium release intrinsic to alkali activation. Low-pressure CO2 curing (1-1.5 bar) was also explored but resulted in structural instability, underscoring the limitations of carbonation curing for this material. Predictive models developed using Multiple Linear Regression and Gene Expression Programming captured key relationships between composition, index properties, and strength development. Overall, the findings establish alkali-activated WGP as a promising sustainable stabilizer for marginal soils, offering improved engineering performance while addressing waste-management and environmental objectives aligned with Saudi Arabia’s Vision 2030.

Item Type:	Thesis (Masters)
Subjects:	Environmental Civil Engineering > Geotechnical Engineering
Department:	College of Design and Built Environment > Civil and Environmental Engineering
Committee Advisor:	Naqvi, Syed Umair Ali
Committee Members:	Aziz, Mubashir and Khalid, Hammad Raza
Depositing User:	BERJEES IR QADRI (g202321170)
Date Deposited:	30 Dec 2025 04:36
Last Modified:	30 Dec 2025 04:36
URI:	http://eprints.kfupm.edu.sa/id/eprint/143939