Utility materials incorporating a microparticle matrix formed with a setting agent

A method of making a utility material comprising:

• providing a wallboard having a first facing membrane and a second facing membrane;
• forming a core matrix including a mixture of:
• a plurality of microparticles,
• wherein the microparticles are cenospheres having an outer shell and a hollow interior filled with a gas, and
• wherein the microparticles have a crush strength between 3000 psi and 5000 psi,
• a sodium silicate binder, and
• an isocyanate setting agent;
• disposing the core matrix between the first facing membrane and the second facing membrane of the wallboard,
• wherein the outer shell of the microparticles excludes the sodium silicate binder and the isocyanate setting agent from the hollow interior of the plurality of microparticles;
• setting the core matrix to form a set core matrix;
• and
• making the utility material.