Optimalisasi Kinerja Beton Trass Alam Volume Tinggi: Perkembangan Kuat Tekan, Susut, dan Evaluasi Non-Destruktif

Rohmannov, Aghits Royyan (2026) Optimalisasi Kinerja Beton Trass Alam Volume Tinggi: Perkembangan Kuat Tekan, Susut, dan Evaluasi Non-Destruktif. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tingginya emisi karbon dari industri semen mendorong pemanfaatan supplementary cementitious materials (SCM) lokal seperti trass. Penelitian ini bertujuan untuk menganalisis pengaruh substitusi kadar trass tinggi (high-volume trass) sebesar 40% (T40), 50% (T50), dan 60% (T60) dari total binder terhadap karakteristik mekanis dan fisik beton berbasis semen Portland Composite Cement (PCC), serta mengevaluasi sinergi chemical admixture berupa superplasticizer (SP) 1% dan viscosity modifying admixture (VMA) 0,3%. Metode penelitian dilakukan secara eksperimental di laboratorium dengan pengujian sifat segar dan beton keras yang meliputi uji slump, vicat test, kuat tekan (umur 7, 14, 28, dan 56 hari), shrinkage test, serta pengujian non-destruktif (hammer test dan ultrasonic pulse velocity / UPV). Hasil karakterisasi menunjukkan trass Pasuruan memenuhi persyaratan kimia utama jumlah oksida ASTM C618 dengan total triad oksida 78,78%, fase amorf 63,55%, dan kehalusan median (D_50) 8,00 µm. Pada sifat segar, modifikasi berupa penahanan volume air sebesar 30% berhasil memitigasi risiko segregasi sehingga menghasilkan slump stabil berkisar 220–240 mm dengan initial setting time serempak di menit ke-40. Pada pengujian kuat tekan 28 hari, variasi T40 (50,25 MPa) dan T50 (39,18 MPa) berhasil melampaui target mutu struktural fondasi (bored pile), sebesar 35 MPa, serta terus berkembang hingga umur 56 hari (T40 = 56,38 MPa; T50 = 45,19 MPa). Hasil UPV seluruh variasi melampaui 4500 m/s yang mengklasifikasikan internal penampang beton ke dalam mutu excellent quality. Selain itu, kestabilan dimensi meningkat secara signifikan, di mana akumulasi shrinkage 28 hari terkecil dicapai oleh T50 sebesar 0,201% dibandingkan kontrol T0 (0,264%). Secara keseluruhan, beton berbasis PCC-trass dengan substitusi optimum hingga 50% memiliki potensi besar sebagai material struktural ramah lingkungan dengan performa mekanis dan durabilitas yang kompetitif.
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The high carbon emissions from the cement industry drive the utilization of local supplementary cementitious materials (SCMs) such as trass. This study aims to analyze the effect of high-volume trass substitution at 40% (T40), 50% (T50), and 60% (T60) of the total binder on the mechanical and physical characteristics of concrete based on Portland Composite Cement (PCC), as well as to evaluate the synergistic effect of chemical admixtures consisting of 1% superplasticizer (SP) and 0.3% viscosity modifying admixture (VMA). The research was conducted experimentally in the laboratory by testing the fresh and hardened properties of concrete, including the slump test, Vicat test, compressive strength (at 7, 14, 28, and 56 days), shrinkage test, and non-destructive testing (hammer test and ultrasonic pulse velocity / UPV). The characterization results show that Pasuruan trass meets the main chemical requirements of the total oxide content of ASTM C618 with a total of 78.78%, an amorphous phase of 63.55%, and a median particle size (D_50) of 8.00 µm. Regarding the fresh properties, a laboratory field modification by retaining 30% of the planned water volume successfully mitigated segregation and bleeding risks, resulting in a stable slump ranging from 220 to 240 mm with a synchronized initial setting time at the 40th minute. In the 28-day compressive strength test, the T40 (50.25 MPa) and T50 (39.18 MPa) variations successfully exceeded the targeted structural specification for concrete piles of 35 MPa and continued to gain strength up to 56 days (T40 = 56.38 MPa; T50 = 45.19 MPa). The UPV values of all variations exceeded 4500 m/s, classifying the internal concrete cross-sections under the "excellent quality" category. Furthermore, dimensional stability improved significantly, where the lowest 28-day cumulative shrinkage was achieved by T50 at 0.201% compared to the control T0 (0.264%). Overall, PCC-trass-based concrete with an optimum substitution of up to 50% demonstrates great potential as an eco-friendly structural material with competitive mechanical performance and durability.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Trass, Chemical Admixture, Kuat Tekan Beton, Trass, Chemical AdMixture, Concrete Compressive Strength
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. T Technology > TA Engineering (General). Civil engineering (General) > TA439 Lightweight concrete. High strength concrete. T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Aghits Royyan Rohmannov
Date Deposited:	04 Aug 2026 06:04
Last Modified:	04 Aug 2026 06:04
URI:	http://repository.its.ac.id/id/eprint/143117

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