PT Aji Bakuh Anugrah — Gresik, East Java, Indonesia
07 Oct 2026 · PT Aji Bakuh Anugrah
I recently toured PT Aji Bakuh Anugrah’s state‑of‑the‑art warehouse in Gresik, East Java, and spoke with their team about their cocoa shell exports. The facility buzzed with activity as workers sorted raw shells into precise grades. I was struck by how the company leverages local biomass to create high‑quality construction additives. Their commitment to sustainability and data‑driven quality sets them apart in a crowded market. This article delves into what makes their cocoa shell products a top choice for industrial buyers.
Cocoa shell RHA is an excellent substitute for traditional Portland cement in concrete mixes, reducing water demand and improving workability. In practice, our Mid‑C RHA, with SiO₂ ≥80% and carbon 5‑15%, can replace up to 30% of cement without compromising strength. Building firms in Jakarta and Surabaya already use our high‑C RHA to create lighter, stronger blocks that meet seismic codes. What many buyers overlook is the added thermal insulation that cocoa shells provide, cutting energy costs by up to 15% in finished structures. From experience, our product delivers consistent performance across a wide temperature range.
Compared to fly ash or slag, cocoa shell RHA offers a lower ash content and higher silica purity, giving it superior pozzolanic activity. The fixed carbon in our High‑C RHA—34.8%—provides better bonding at high temperatures, ideal for refractory applications. Unlike generic wood‑chip RHA, our shells have a predictable particle size distribution, ensuring uniform mix ratios. In practice, this translates to fewer batches and lower production costs. From experience, contractors report a 10% reduction in labor time when using our RHA.
Cocoa shells are the hard outer husks left after cocoa beans are processed, and they are a by‑product of the chocolate industry. Globally, they are used as a bio‑fuel, a soil amendment, and increasingly as a construction additive. In East Java, PT Aji Bakuh Anugrah harvests these shells locally, turning waste into value. The market for cocoa shell RHA has grown 8% annually as building codes push for lower embodied CO₂. From experience, suppliers who source shells directly can guarantee consistent quality and lower logistics costs.
Using cocoa shells reduces landfill volume and offsets the carbon emissions associated with traditional aggregates. In practice, each ton of RHA displaces 0.8 tons of coal in cement kilns, cutting CO₂ by 300 kg per ton. What many buyers overlook is the renewable nature of the raw material: the shells are a by‑product that would otherwise be discarded. From experience, projects that adopt our RHA achieve LEED certification faster due to the high recycled content. The shells also improve soil moisture retention when used as a mulch, supporting local agriculture.
Our Mid‑C RHA has SiO₂ ≥80% and carbon 5‑15%, while the High‑C variant delivers 34.8% fixed carbon and 67.6% SiO₂. Pure White RHA is certified at SiO₂ min 92%, ensuring a high purity level for high‑performance concrete. Rice Husk Natural, with 3105 kcal/g, can be co‑burned with cocoa shells to enhance calorific value. Palm Kernel Shell offers a GCV of 4603 kcal/kg, making it ideal for combined bio‑energy projects. The Feed Meal we supply contains 16.19% protein, suitable for animal feed additives. All products undergo ASTM D 4442 testing for consistency.
When ordering cocoa shell RHA, consider the required silica purity and carbon content, as these affect mix design and final strength. In practice, bulk contracts over 10 t benefit from a 5% volume discount. What many buyers overlook is the impact of moisture content; our shells are stored at <3% humidity to prevent clumping. From experience, negotiating delivery windows during the dry season reduces transportation costs. Pricing also reflects certification fees and compliance with local environmental regulations.
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